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Are Saddle Valves Legal In Ohio

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Paul Gonzalez
• Sunday, 15 November, 2020
• 30 min read

This chapter shall govern the materials, design and installation of water supply systems within a building, both hot and cold, for utilization in connection with human occupancy and habitation. This chapter shall not apply to private water systems or recycled water systems as defined in section 3701.344 of the Revised Code and as defined in rule 3701-28-01 of the Administrative Code and within the scope of the rules of the Ohio Department of Health”.

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Contents

This chapter shall not apply to public water systems as defined in division (A) of section 6109.01 of the Revised Code and as defined in rule 3745-81-01 of the Administrative Code and within the scope of the rules of the Ohio Environmental Protection Agency”. Solar energy systems used for heating potable water or using an independent medium for heating potable water shall comply with the applicable requirements of this code.

The use of solar energy shall not compromise the requirements for cross connection or protection of the potable water supply system required by this code. Existing metallic water service piping used for electrical grounding shall not be replaced with nonmetallic pipe or tubing until other approved means of grounding is provided.

The potable water distribution system shall be tested in accordance with Section 312.5. Structures equipped with plumbing fixtures and utilized for human occupancy or habitation shall be provided with a potable supply of water in the amounts and at the pressures specified in this chapter.

Only potable water shall be supplied to plumbing fixtures that provide water for drinking, bathing or culinary purposes, or for the processing of food, medical or pharmaceutical products. Unless otherwise provided in this code, potable water shall be supplied to all plumbing fixtures.

The water service pipe shall be not less than ¾ inch (19.1 mm) in diameter. 603.2 Separation of water service and building sewer.

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Where water service piping is located in the same trench with the building sewer, and the building sewer piping is not constructed of materials listed in Table 702.2, the water service pipe and the building sewer shall be horizontally separated by not less than 5 feet (1524 mm) of undisturbed or compacted earth. The required separation distance shall not apply where a water service pipe crosses a sewer pipe, provided the water service is sleeved to a point not less than 5 feet (1524 mm) horizontally from the sewer pipe centerline on both sides of such crossing.

The sleeve shall be of pipe materials listed in Table 605.3, 702.2, or other pipe material acceptable to the authority having jurisdiction for the building sewer. The required separation distance shall not apply where the bottom of the water service pipe, located within 5 feet (1524 mm) of the sewer, is not less than 12 inches above the highest point of the top of the building sewer. Potable water service pipes shall not be located in, under or above cesspools, septic tanks, septic tank drainage fields or seepage pits (see Section 605.1 for soil and groundwater conditions).

Enforcement of the provisions of this section is the responsibility of the certified building official of the certified municipal, county, or township building department having jurisdiction or the superintendent of the division of industrial compliance. The design of the water distribution system shall conform to accepted engineering practice.

Methods utilized to determine pipe sizes shall be approved. At the points of interconnection between the hot and cold water supply piping systems and the individual fixtures, appliances or devices, provisions shall be made to prevent flow between such piping systems.

The water distribution system shall be designed, and pipe sizes shall be selected such that under conditions of peak demand, the capacities at the fixture supply pipe outlets shall be not less than shown in Table 604.3. The minimum flow rate and flow pressure provided to fixtures and appliances not listed in Table 604.3 shall be in accordance with the manufacturer's installation instructions.

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WATER DISTRIBUTION SYSTEM DESIGN CRITERIA REQUIRED CAPACITY AT FIXTURE SUPPLY PIPE OUTLETS For SI: 1 pound per square inch = 6.895 PA, 1 gallon per minute = 3.785 L/m.

For additional requirements for flow rates and quantities, see Section 604.4. Where the shower mixing valve manufacturer indicates a lower flow rating for the mixing valve, the lower value shall be applied.

Clinical sinks having a water consumption not greater than 4½ gallons (17 L) per flushing cycle. The minimum size of a fixture supply pipe shall be as shown in Table 604.5.

A reduced size flexible water connector installed between the supply pipe and the fixture shall be of an approved type. The supply pipe shall extend to the floor or wall adjacent to the fixture.

The minimum size of individual distribution lines utilized in guided or parallel water distribution systems shall be as shown in Table 604.5. Where street water main pressures fluctuate, the building water distribution system shall be designed for the minimum pressure available.

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Wherever water pressure from the street main or other source of supply is insufficient to provide flow pressures at fixture outlets as required under Table 604.3, a water pressure booster system conforming to Section 606.5 shall be installed on the building water supply system. Where water pressure within a building exceeds 80 psi (552 PA) static, an approved water pressure-reducing valve conforming to ASSE 1003 or CSA B356 with strainer shall be installed to reduce the pressure in the building water distribution piping to not greater than 80 psi (552 PA) static.

Where the developed length of the distribution line is 50 feet or fewer, and the available pressure at the meter is 35 psi or greater, the minimum size of an individual distribution line supplied from a manifold and installed as part of a parallel water distribution system shall be one nominal tube size smaller than the sizes indicated. Water pressure-reducing valves, regulators and strainers shall be so constructed and installed as to permit repair or removal of parts without breaking a pipeline or removing the valve and strainer from the pipeline.

604.10 Guided and parallel water distribution system manifolds. Hot water and cold water manifolds installed with guided or parallel connected individual distribution lines to each fixture or fixture fitting shall be designed in accordance with Sections 604.10.1 through 604.10.3.

The total gallons per minute is the demand of all outlets supplied. For SI: 1 inch = 25.4 mm, 1 gallon per minute = 3.785 L/m, 1 foot per second = 0.305 m/s.

Access shall be provided to manifolds with integral factory-or field-installed valves. Such valves shall be installed in an accessible location and shall not be utilized alone as a substitute for the balanced pressure, thermostatic or combination shower valves required in Section 424.3.

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The installation of a water service or water distribution pipe shall be prohibited in soil and groundwater contaminated with solvents, fuels, organic compounds or other detrimental materials causing permeation, corrosion, degradation or structural failure of the piping material. Where detrimental conditions are suspected, a chemical analysis of the soil and groundwater conditions shall be required to ascertain the acceptability of the water service or water distribution piping material for the specific installation.

Where detrimental conditions exist, approved alternative materials or routing shall be required. 605.2 Lead content of water supply pipe and fittings.

Water distribution main gate valves two inches in diameter or larger. Water service pipe or tubing, installed underground and outside the structure, shall have a working pressure rating of not less than 160 psi (1100 PA) at 73.4 of (23ºC).

Water service piping materials not listed by and approved agency for water distribution shall terminate at or before the full open valve located at the entrance to the structure. Ductile iron water service piping shall be cement mortar lined in accordance with AWA C104.

Dual check-valve backflow presenters installed on the water supply system shall comply with ASSE 1024 or CSA B 64.6. Hot water distribution pipe and tubing shall have a pressure rating of not less than 100 psi (690 PA) at 180ºF (82ºC).

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Pipe fittings shall be approved for installation with the piping material installed and shall comply with the applicable standards listed in Table 605.5. Pipe fittings utilized in water supply systems shall also comply with NSF 61.

Mechanically extracted outlets shall have a height not less than three times the thickness of the branch tube wall. Mechanically formed tee fittings shall be brazed in accordance with Section 605.14.1.

Valves shall be compatible with the type of piping material installed in the system. Valves shall conform to one of the standards listed in Table 605.7 or shall be approved.

Valves intended to supply drinking water shall meet the requirements of NSF 61. Manufactured pipe nipples shall conform to one of the standards listed in Table 605.8.

Joints made with fittings not approved for the specific installation. Solvent-cement joints between different types of plastic pipe.

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Joints between ABS plastic pipe and fittings shall comply with Sections 605.10.1 through 605.10.3. Mechanical joints on water pipes shall be made with an elastomeric seal conforming to ATM D 3139.

Mechanical joints shall only be installed in underground systems, unless otherwise approved. Joint surfaces shall be clean and free from moisture.

Solvent cement that conforms to ATM D 2235 shall be applied to all joint surfaces. Joints between brass pipe and fittings shall comply with Sections 605.11.1 through 605.11.4.

Chlorinated polyvinyl chloride (CPC) plastic Joints for gray and ductile iron pipe and fittings shall comply with AWA C111/A 21.11 and shall be installed in accordance with the manufacturer's instructions.

Joints between copper or copper-alloy pipe and fittings shall comply with Sections 605.13.1 through 605.13.5. The joint shall be brazed with a filler metal conforming to AWS A 5.8.

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Mechanical joints shall be installed in accordance with the manufacturer's instructions. The joining of water supply piping shall be made with lead-free solder and fluxes.

The joint shall be brazed with a filler metal conforming to AWS A 5.8. Flared joints for water pipe shall be made by a tool designed for that operation.

Grooved and shouldered mechanical joints shall comply with ATM F 1476, shall be made with an approved elastomeric seal and shall be installed in accordance with the manufacturer's instructions. Press-connect joints shall conform to one of the standards listed in Table 605.5, and shall be installed in accordance with the manufacturer's instructions.

Press-connect joints shall be pressed with a tool certified by the manufacturer. Solder joints shall be made in accordance with the methods of ATM B 828.

The joining of water supply piping shall be made with lead-free solders and fluxes. Joints between CPC plastic pipe and fittings shall comply with Sections 605.15.1 through 605.15.3.

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Mechanical joints shall be installed in accordance with the manufacturer's instructions. Joint surfaces shall be clean and free from moisture.

Joints shall be made in accordance with the pipe manufacturer's installation instructions. Where such instructions require that a primer be used, the primer shall be applied to the joint surfaces and a solvent cement orange and conforming to ATM F 493 shall be applied to the joint surfaces.

Where such instructions allow for a one-step solvent cement, yellow in color and conforming to ATM F 493, to be used, the joint surfaces shall not require application of a primer before the solvent cement is applied. Joints between CPC/AL/CPC plastic pipe or CPC fittings shall comply with Sections 605.16.1 and 605.16.2.

Joint surfaces shall be clean and free from moisture, and an approved primer shall be applied. Solvent cement, orange and conforming to ATM F 493, shall be applied to joint surfaces.

The solvent cement used is listed by an approved agency as conforming to ATM F 493. Joints between cross-linked polyethylene plastic tubing and fittings shall comply with Sections 605.17.1 and 605.17.2.

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Flared pipe ends shall be made by a tool designed for that operation. Fittings for cross-linked polyethylene (Ex) plastic tubing shall comply with the applicable standards listed in Table 605.5 and shall be installed in accordance with the manufacturer's instructions.

Joints between galvanized steel pipe and fittings shall comply with Sections 605.18.1 through 605.18.3. Grooved and shouldered mechanical joints shall comply with ATM F 1476, shall be made with an approved elastomeric seal and shall be installed in accordance with the manufacturer's instructions.

Joints between polyethylene plastic pipe or tubing and fittings shall comply with Sections 605.19.1 through 605.19.4. Flared joints shall be permitted where so indicated by the pipe manufacturer.

Flared joints shall be made by a tool designed for that operation. Joint surfaces shall be clean and free from moisture.

All joint surfaces shall be heated to melt temperature and joined. Mechanical joints shall be installed in accordance with the manufacturer's instructions.

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Except where joined by heat fusion, pipe ends shall be chambered to remove sharp edges. Piping shall not be bent beyond straightening of the curvature of the coil.

Bends shall be prohibited within 10 pipe diameters of any fitting or valve. Joints between PP plastic pipe and fittings shall comply with Section 605.20.1 or 605.20.2.

Joint surfaces shall be clean and free from moisture. Mechanical and compression sleeve joints shall be installed in accordance with the manufacturer's instructions.

Mechanical joints shall be installed in accordance with the manufacturer's instructions. Joints between PVC plastic pipe and fittings shall comply with Sections 605.22.1 through 605.22.3.

Mechanical joints on water pipe shall be made with an elastomeric seal conforming to ATM D 3139. Grooved and shouldered mechanical joints shall comply with ATM F 1476, shall be made with an approved elastomeric seal and shall be installed in accordance with the manufacturer's instructions.

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Joint surfaces shall be clean and free from moisture. Solvent cement conforming to ATM D 2564 or CSA B 137.3 shall be applied to all joint surfaces.

The joint shall be made while the cement is wet and shall be in accordance with ATM D 2855. Joints between stainless steel pipe and fittings shall comply with Sections 605.23.1 and 605.23.3.

Mechanical joints shall be installed in accordance with the manufacturer's instructions. The joint shall be welded autonomously or with an approved filler metal as referenced in ATM A 312.

Grooved and shouldered mechanical joints shall comply with ATM F 1476, shall be made with an approved elastomeric seal and shall be installed in accordance with the manufacturer's instructions. Connectors or adapters shall have an elastomeric seal conforming to ATM F 477.

Joints between copper or copper-alloy tubing and galvanized steel pipe shall be made with a brass fitting or dielectric fitting or a dielectric union conforming to ASSE 1079. Joints between stainless steel and different piping materials shall be made with a mechanical joint of the compression or mechanical sealing type or a dielectric fitting or a dielectric union conforming to ASSE 1079.

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Joints between polyethylene of raised temperature plastic tubing and fittings shall be in accordance with Section 605.25.1. Mechanical joints shall be installed in accordance with the manufacturer's instructions.

On the water distribution supply pipe at the entrance into the structure. On the entrance to every water supply pipe to a dwelling unit, except where supplying a single fixture equipped with individual stops.

On the fixture supply to each plumbing fixture other than in individual sleeping units that are provided with unit shutoff valves in hotels, motels, boarding houses and similar occupies. On the water supply pipe to each appliance or mechanical equipment.

Water pressure booster systems shall be provided as required by Sections 606.5.1 through 606.5.10. All water supply tanks shall be supported in accordance with the building code.

All water supply tanks shall be covered to keep out unauthorized persons, dirt and vermin. The covers of gravity tank shall be vented with a return bend vent pipe with an area not less than the area of the down-feed riser pipe, and the vent shall be screened with a corrosion resistant screen of not less than 16 by 20 mesh per inch (630 by 787 mesh per m).

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A gravity or suction water supply tank shall be provided with an overflow with a diameter not less than that shown in Table 606.5.4. The overflow outlet shall discharge at a point not less than 6 inches (152 mm) above the roof or roof drain; floor or floor drain; or over an open water-supplied fixture.

The overflow outlet shall be covered with a corrosion-resistant screen of not less than 16 by 20 mesh per inch (630 by 787 mesh per m) and by ¼-inch (6.4 mm) hardware cloth or shall terminate in a horizontal angle seat check valve. Drainage from overflow pipes shall be directed so as not to freeze on roof walks.

For SI: 1 inch = 25.4 mm, 1 gallon per minute = 3.785 L/m. In accordance with rule 3745-95-07 of the Administrative Code, a low-pressure cutoff, a low suction throttling valve, or variable speed suction limiting controls shall be installed on all booster pumps in a water pressure booster system to prevent creation of a vacuum or negative pressure on the suction side of the pump when a positive pressure of 10 psi (68.94 PA) or less occurs on the suction side of the pump while the pump is operating.

Enforcement of the referenced rule is the responsibility of the local water supplier. 606.5.6 Potable water inlet control and location.

Potable water inlets to gravity tanks shall be controlled by a fill valve or other automatic supply valve installed to prevent the tank from overflowing. The inlet shall be terminated to provide an air gap not less than 4 inches (102 mm) above the overflow.

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SIZE OF DRAIN PIPES FOR WATER TANKS Potable water gravity tanks or manholes of potable water pressure tanks shall not be located directly under any soil or waste piping or any source of contamination.

All water pressure tanks shall be provided with a vacuum relief valve at the top of the tank that will operate up to a maximum water pressure of 200 psi (1380 PA) and up to a maximum temperature of 200ºF (93ºC). The size of such vacuum relief valve shall be not less than ½ inch (12.7 mm).

Exception: This section shall not apply to pressurized captive air diaphragm/bladder tanks. The relief valve shall discharge by gravity to a safe place of disposal.

Upon completion of a section of or the entire water supply system, the system, or portion completed, shall be tested in accordance with Section 312. The interval of the identification markings on the pipe shall not exceed 25 feet (7620 mm).

There shall be not less than one identification label on each pipe in each room, space or story. In residential occupies, hot water shall be supplied to plumbing fixtures and equipment utilized for bathing, washing, culinary purposes, cleansing, laundry or building maintenance.

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A thermostat control for a water heater shall not serve as the temperature limiting means for the purposes of complying with the requirements of this code for maximum allowable hot or tempered water delivery temperature at fixtures. This provision shall not supersede the requirement for protective shower valves in accordance with Section 424.3.

Automatic circulating hot water system pumps or heat trace shall be arranged to be conveniently turned off, automatically or manually, when the hot water system is not in operation. 607.2.1.1 Pump controls for hot water storage systems.

The control shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture, or sensing the flow of hot or tempered water to a fixture fitting or appliance. 607.2.2 Piping for recirculation systems having master thermostatic valves.

Where a storage water heater is supplied with cold water that passes through a check valve, pressure reducing valve or backflow prevented, a thermal expansion tank shall be connected to the water heater cold water supply pipe at a point that is downstream of all check valves, pressure reducing valves and backflow presenters. Thermal expansion tanks shall be sized in accordance with the tank manufacturer's instructions and shall be sized such that the pressure in the water distribution system shall not exceed that required by Section 604.8.

Exception: Shower and tub/shower mixing valves conforming to ASSE 1016/Ashe A 112.1016 /CSA B 125.16 or Ashe A112.18.1/CSA B 125.1, where the flow of hot water corresponds to the markings on the device. Piping to the inlet of a water heater and piping conveying water heated by a water heater shall be insulated in accordance with the applicable energy conservation standard referenced in Chapter 13 of the building code or Chapter 11 of the “Residential Code of Ohio ".

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A potable water supply system within a building shall be designed, installed and maintained in such a manner to prevent contamination from nonpotable liquids, solids or gases being introduced into the building potable water supply through cross connections or any other piping connections to the system. Isolation backflow prevention device applications shall conform to Table 608.1, except as specifically stated in Sections 608.2 through 608.16.10.

The supply lines and fittings for plumbing fixtures shall be installed to prevent backflow. Plumbing fixture fittings shall provide backflow protection in accordance with Ashe A112.18.1/CSA B 125.1.

Devices, appurtenances, appliances and apparatus intended to serve some special function, such as sterilization, distillation, processing, cooling, or storage of ice or foods, and that connect to the water supply system, shall be provided with protection against backflow and contamination of the water supply system. Water pumps, water-powered sump pumps, filters, softeners, tanks and other appliances and devices that handle or treat potable water shall be protected against contamination.

The water supply for hospital fixtures shall be protected against backflow with a reduced pressure principle backflow prevention assembly, an atmospheric or spill-resistant vacuum breaker assembly, or an air gap. Vacuum breakers for bedpan washer hoses shall not be located less than 5 feet (1524 mm) above the floor.

Vacuum breakers for hose connections in health care or laboratory areas shall not be less than 6 feet (1829 mm) above the floor. Water service piping shall be protected in accordance with Sections 603.2 and 603.2.1.

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Chemicals and other substances that produce either toxic conditions, taste, odor or discoloration in a potable water system shall not be introduced into, or utilized in, such systems. Cross connections shall be prohibited, except where approved backflow prevention assemblies, backflow prevention devices or other means or methods are installed to protect the potable water supply.

Potable water outlets and combination stop-and-waste valves shall not be installed underground or below grade. Freeze proof yard hydrants that drain the riser into the ground are considered to be stop-and-waste valves.

Exception: Freeze proof yard hydrants that drain the riser into the ground shall be permitted to be installed, provided that the potable water supply to such hydrants is protected upstream of the hydrants in accordance with Section 608 and the hydrants are permanently identified as nonpotable outlets by approved signage that reads as follows: “Caution, Non potable Water. Color marking, metal tags or tape in accordance with Sections 608.8.1 through 608.8.2.3.608.8.1 Signage required.

Non potable water outlets, such as hose connections, open-ended pipes and faucets, shall be identified with signage that reads as follows: “Non potable water is utilized for . The words shall be legibly and indelibly printed on a tag or sign constructed of corrosion-resistant waterproof material or shall be indelibly printed on the fixture.

Pipe identification shall be repeated at intervals not exceeding 25 feet (7620 mm) and at each point where the piping passes through a wall, floor or roof. Lettering shall be readily observable within the room or space where the piping is located.

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The color of the pipe identification shall be discernible and consistent throughout the building. The color purple shall be used to identify reclaimed, rain and gray water distribution systems.

Air gap fittings for use with plumbing fixtures, appliances and appurtenances The interior surface of a potable water tank shall not be lined, painted or repaired with any material that changes the taste, odor, color or potability of the water supply when the tank is placed in, or returned to, service.

Means of protection against backflow shall be provided in accordance with Sections 608.13.1 through 608.13.10. The minimum required air gap shall be measured vertically from the lowest end of a potable water outlet to the flood level rim of the fixture or receptacle into which such potable water outlet discharges.

608.13.2 Reduced pressure principle backflow prevention assemblies. Reduced pressure detector assembly backflow presenters shall conform to ASSE 1047.

These devices shall be permitted to be installed where subject to continuous pressure conditions. The relief opening shall discharge by air gap and shall be prevented from being submerged.

608.13.3 Backflow prevented with intermediate atmospheric vent. Backflow presenters with intermediate atmospheric vents shall conform to ASSE 1012 or CSA B 64.3.

These devices shall be permitted to be installed where subject to continuous pressure conditions. The relief opening shall discharge by air gap and shall be prevented from being submerged.

Barometric loops shall precede the point of connection and shall extend vertically to a height of 35 feet (10 668 mm). Pressure vacuum breaker assemblies shall conform to ASSE 1020 or CSA B64.1.2.

Spill-resistant vacuum breaker assemblies shall comply with ASSE 1056. Pressure vacuum breaker assemblies shall not be installed in locations where spillage could cause damage to the structure.

These devices shall operate under normal atmospheric pressure when the critical level is installed at the required height. 608.13.7 Double check backflow prevention assemblies.

Double check detector fire protection backflow prevention assemblies shall conform to ASSE 1048. These assemblies shall be capable of operating under continuous pressure conditions.

Spill-resistant pressure vacuum breaker assemblies shall conform to ASSE 1056 or CSA B64.1.3. Backflow devices for chemical dispensers shall comply with ASSE 1055 or shall be equipped with an air gap fitting.

Dual check backflow presenters shall conform to ASSE 1024 or CSA B 64.6. Access shall be provided to backflow presenters as specified by the manufacturer's instructions.

608.14.1 Outdoor enclosures for backflow prevention devices. Outdoor enclosures for backflow prevention devices shall comply with ASSE 1060.

Backflow presenters shall not be located in areas subject to freezing except where they can be removed by means of unions or are protected from freezing by heat, insulation or both. The termination of the piping from the relief port or air gap fitting of a backflow prevented shall discharge to an approved indirect waste receptor or to the outdoors where it will not cause damage or create a nuisance.

All potable water openings and outlets shall be protected against backflow in accordance with Section 608.15.1, 608.15.2, 608.15.3, 608.15.4, 608.15.4.1 or 608.15.4.2. Openings and outlets equipped for hose connection shall be protected by means other than an air gap.

608.15.2 Protection by reduced pressure principle backflow prevention assembly. Openings and outlets shall be protected by a reduced pressure principle backflow prevention assembly or a reduced pressure principle fire protection backflow prevention assembly on potable water supplies.

608.15.3 Protection by a backflow prevented with intermediate atmospheric vent. Openings and outlets shall be protected by a backflow prevented with an intermediate atmospheric vent.

Over-rim bath fillers and other fixtures with effective openings not greater than 1 inch in diameter a. Applicable where walls or obstructions are spaced from the nearest inside-edge of the spout opening a distance greater than three times the diameter of the effective opening for a single wall, or a distance greater than four times the diameter of the effective opening for two intersecting walls.

Openings and outlets shall be protected by atmospheric-type or pressure type vacuum breakers. Fill valves shall be set in accordance with Section 425.3.1.

Vacuum breakers shall not be installed under exhaust hoods or similar locations that will contain toxic fumes or vapors. Pipe-applied vacuum breakers shall be installed not less than 6 inches (152 mm) above the flood level rim of the fixture, receptor or device served.

Approved deck-mounted or equipment mounted vacuum breakers and faucets with integral atmospheric vacuum breakers or spill-resistant vacuum breaker assemblies shall be installed in accordance with the manufacturer's instructions and the requirements for labeling with the critical level not less than 1 inch (25 mm) above the flood level rim. This section shall not apply to water heater and boiler drain valves that are provided with hose connection threads and that are intended only for tank or vessel draining.

This section shall not apply to water supply valves intended for connection of clothes washing machines where backflow prevention is otherwise provided or is integral with the machine. Connections to the potable water system shall conform to Section 608.16.1 through 608.16.10.

The water supply connection to beverage dispensers shall be protected against backflow by a backflow prevented conforming to ASSE 1022 or by an air gap. The portion of the backflow prevented device downstream from the second check valve and the piping downstream therefrom shall not be affected by carbon dioxide gas.

The potable supply to the boiler shall be equipped with a backflow prevented with an intermediate atmospheric vent complying with ASSE 1012 or CSA B 64.3. Where conditioning chemicals are introduced into the system, the potable water connection shall be protected by an air gap or a reduced pressure principle backflow prevented, complying with ASSE 1013, CSA B 64.4 or AWA C511.

If the boiler feed water, water treatment, or make-up water pipe is not provided with a high temperature check valve (rated at not less than 250 of) near the boiler stop valve, then the temperature rating of the backflow prevented shall be not less than 250 of. Heat exchangers utilizing an essentially toxic transfer fluid shall be separated from the potable water by double-wall construction.

An air gap open to the atmosphere shall be provided between the two walls. Heat exchangers utilizing an essentially nontoxic transfer fluid shall be permitted to be of single-wall construction.

The potable water supply to automatic fire sprinkler and standpipe systems shall be protected against backflow by a double check backflow prevention assembly, a double check fire protection backflow prevention assembly or a reduced pressure principle fire protection backflow prevention assembly. Where systems under continuous pressure contain chemical additives or antifreeze, or where systems are connected to a nonpotable secondary water supply, the potable water supply shall be protected against backflow by a reduced pressure principle backflow prevention assembly or a reduced pressure principle fire protection backflow prevention assembly.

Where chemical additives or antifreeze are added to only a portion of an automatic fire sprinkler or standpipe system, the reduced pressure principle backflow prevention assembly or the reduced pressure principle fire protection backflow prevention assembly shall be permitted to be located to isolate that portion of the system. Where systems are not under continuous pressure, the potable water supply shall be protected against backflow by an air gap or an atmospheric vacuum breaker conforming to ASSE 1001 or CSA B64.1.1.

The potable water supply to lawn irrigation systems shall be protected against backflow by an atmospheric vacuum breaker, a pressure vacuum breaker assembly or a reduced pressure principle backflow prevention assembly. Valves shall not be installed downstream from an atmospheric vacuum breaker.

Where chemicals are introduced into the system, the potable water supply shall be protected against backflow by a reduced pressure principle backflow prevention assembly. Where a potable water connection is made to a nonpotable line, fixture, tank, vat, pump or other equipment subject to high-hazard back pressure, the potable water connection shall be protected by a reduced pressure principle backflow prevention assembly.

Where chemical dispensers connect to the potable water distribution system, the water supply system shall be protected against backflow in accordance with Section 608.13.1, 608.13.2, 608.13.5, 608.13.6, 608.13.8 or 608.13.9. Where the portable cleaning equipment connects to the water distribution system, the water supply system shall be protected against backflow in accordance with Section 608.13.1, 608.13.2, 608.13.3, 608.13.7 or 608.13.8.

Where dental pumping equipment connects to the water distribution system, the water supply system shall be protected against backflow in accordance with Section 608.13.1, 608.13.2, 608.13.5, 608.13.6 or 608.13.8. The water supply connection to coffee machines and noncarbonated beverage dispensers shall be protected against backflow by a backflow prevented conforming to ASSE 1022 or by an air gap.

An individual water supply, otherwise known as a private water system, shall be located and constructed to be safeguarded against contamination in accordance with the rules of the “ Ohio Department of Health” set forth in Chapter 3701-28 of the Administrative Code, “Private Water Systems.” The provisions of this section shall apply to the special devices and equipment installed and maintained in the following occupies: nursing homes, homes for the aged, orphanages, infirmaries, first aid stations, psychiatric facilities, clinics, professional offices of dentists and doctors, mortuaries, educational facilities, surgery, dentistry, research and testing laboratories, establishments manufacturing pharmaceutical drugs and medicines and other structures with similar apparatus and equipment classified as plumbing.

Hot water shall be provided to supply all the hospital fixture, kitchen and laundry requirements. Special fixtures and equipment shall have hot water supplied at a temperature specified by the manufacturer.

The hot water system shall be installed in accordance with Section 607. Vacuum breakers shall be installed not less than 6 inches (152 mm) above the flood level rim of the fixture or device in accordance with Section 608.

609.5 Prohibited water closet and clinical sink supply. Jet or water-supplied orifices, except those supplied by the flush connections, shall not be located in or connected with a water closet bowl or clinical sink.

Clinical, hydro therapeutic, radiological or any equipment that is supplied with water or that discharges to the waste system shall conform to the requirements of this section and Section 608. A water supply shall be provided for cleaning, flushing and resealing the condensate trap, and the trap shall discharge through an air gap in accordance with Section 608.

New potable water systems shall be purged of deleterious matter and disinfected prior to utilization. The method to be followed shall be that prescribed by the health authority or water purveyor having jurisdiction or, in the absence of a prescribed method, the procedure described in either AWA C651 or AWA C652, or as described in this section.

The procedure shall be repeated where shown by a bacteriological examination that contamination remains present in the system. The discharge from a reverse osmosis drinking water treatment unit shall enter the drainage system through an air gap or an air gap device that meets the requirements of NSF 58 or CSA B 483.1.

The tubing to and from drinking water treatment units shall be of a size and material as recommended by the manufacturer. Temperature-actuated mixing valves, which are installed to reduce water temperatures to defined limits, shall comply with ASSE 1017.

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