- Bathtubs, showers, lavatories, clothes washers and laundry sinks shall not be required to discharge to the sanitary drainage system where such fixtures discharge to a gray water recycling system approved by the "Ohio Environmental Protection Agency" in accordance with Chapter 3745-42 of the Administrative Code.
- Wastes from dental or cuspidor fountains, drinking fountains, bar sinks, soda fountains, floor drains or shower drains may be indirectly connected by means of an air break to the sanitary drainage system. Each indirectly connected item listed above shall individually discharge to a directly connected floor drain, waste receptor or standpipe.
|Copper or copper-alloy pipe||12||10|
|Copper or copper-alloy tubing,|
11/4-inch diameter and smaller
|Copper or copper-alloy tubing,|
11/2-inch diameter and larger
aluminum/cross-linked polyethylene (PEX-AL-PEX)pipe
|CPVC pipe or tubing, 1 inch|
|CPVC pipe or tubing, 11/4 inches|
polyethylene (PE-AL-PE) pipe
|Polypropylene (PP) pipe or tubing|
1 inch and smaller
|Polypropylene (PP) pipe or|
tubing, 11/4 inches and larger
|Stainless steel drainage systems||10||10b|
- The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed.
- Midstory guide for sizes 2 inches and smaller.
- Water closet compartments shall not be required in a single-occupant toilet room with a lockable door.
- Toilet rooms located in day care and child-care facilities and containing two or more water closets shall be permitted to have one water closet without an enclosing compartment.
- This provision is not applicable to toilet areas located within Group I-3 housing areas.
- Tests requiring a pressure of 10 pounds per square inch (psi) (69 kPa) or less shall utilize a testing gauge having increments of 0.10 psi (0.69 kPa) or less.
- Tests requiring a pressure of greater than 10 psi (69 kPa) but less than or equal to 100 psi (689 kPa) shall utilize a testing gauge having increments of 1 psi (6.9 kPa) or less.
- Tests requiring a pressure of greater than 100 psi (689 kPa) shall utilize a testing gauge having increments of 2 psi (14 kPa) or less.
- Close all stack openings;
- A manometer tube shall be placed through a trap seal to the system side and water shall be added to a fixture until an equivalent of at least 1 inch water column (248.8 Pa) is read on the manometer gauge or water-can. Water may be added to a water closet bowl or trap tailpiece extension until the water level is at least one inch higher than the original trap seal;
- Maintain the initial water column for 15 minutes;
- The system shall then be separated at a trap seal, AAV, or other means as directed by the plumbing inspector for verification that the entire system is interconnected.
312.11 Operational Testing of Low Pressure Cut-Off Device, Low Suction Throttling Valves, and Variable Speed Suction Limiting Controls
|EQUIPMENT CAPACITY||MINIMUM CONDENSATE PIPE DIAMETER|
|Up to 20 tons of refrigeration||3/4 inch|
|Over 20 tons to 40 tons of refrigeration||1 inch|
|Over 40 tons to 90 tons of refrigeration||11/4 inch|
|Over 90 tons to 125 tons of refrigeration||11/2 inch|
|Over 125 tons to 250 tons of refrigeration||2 inch|
- An auxiliary drain pan with a separate drain shall be provided under the coils on which condensation will occur. The auxiliary pan drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The pan shall have a minimum depth of 11/2 inches (38 mm), shall not be less than 3 inches (76 mm) larger than the unit or the coil dimensions in width and length and shall be constructed of corrosion-resistant material. Galvanized sheet metal pans shall have a minimum thickness of not less than 0.0236-inch (0.6010 mm) (No. 24 gage) galvanized sheet metal. Nonmetallic pans shall have a minimum thickness of not less than 0.0625 inch (1.6 mm).
- A separate overflow drain line shall be connected to the drain pan provided with the equipment. Such overflow drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The overflow drain line shall connect to the drain pan at a higher level than the primary drain connection.
- An auxiliary drain pan without a separate drain line shall be provided under the coils on which condensate will occur. Such pan shall be equipped with a water-level detection device conforming to UL 508 that will shut off the equipment served prior to overflow of the pan. The auxiliary drain pan shall be constructed in accordance with Item 1 of this section.
- A water-level detection device conforming to UL 508 shall be provided that will shut off the equipment served in the event that the primary drain is blocked. The device shall be installed in the primary drain line, the overflow drain line, or in the equipment-supplied drain pan, located at a point higher than the primary drain line connection and below the overflow rim of such pan.Exception: Fuel-fired appliances that automatically shut down operation in the event of a stoppage in the condensate drainage system.