Category Archives: Plumbing

Residential Code requirement for expansion tank

The 2012 International Residential Code (P2903.4.2) requires the installation of an expansion tank on a hot water tank where thermal expansion may cause an increase in pressure. The tank is only required when the water supply system incorporates a backflow … Continue reading

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Residential Code requirement for TPR discharge drain

  The 2012 International Residential Code (P2803.6.1) provides thirteen requirements for the water heater TPR discharge pipe. 1. Cannot be directly connected to the drainage system 2. Must discharge through an air gap 3. Must not be smaller than the … Continue reading

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Residential Code requirement for scald prevention

The 2012 International Residential Code (P2713.3) addresses the potential for scalding hazards at bathtubs. This section requires the use of a temperature limiting valve, which limits hot water to a temperature of 120 degrees at the faucet. The valve must … Continue reading

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Residential Code requirement for water heater seismic traps

The Residential Building Code (R301.2.2.3.7) requires the use of straps or anchors on water heaters in certain seismic locations.  The requirement for straps can be found in both the mechanical section of the code as well as the plumbing section. … Continue reading

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Residential Code requirement for protection of pipes

The Residential Building Code requires the protection of pipe which is located in concealed locations.  This requirement can be found in several sections of the code including; M1308.2, G2415.7, and P2603.2.1. According to both the mechanical and plumbing sections of … Continue reading

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Residential Code requirement for clothes washer standpipe

The Uniform Plumbing Code (804.1) requires clothes washer standpipes to extend at least 18 inches above the trap, but not more than 30 inches. The pluming portion of the Residential Code (P2706.2), allows for a minimum height of 18 inches … Continue reading

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Residential Code requirement for water hammer arrestor

The building code* requires the use of water hammer arrestors in conjunction with appliances that use quick closing valves.  Examples of these types of appliance include; dishwashers, clothes washers, and even some refrigerators. *Note: There are two primary plumbing codes … Continue reading

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Residential Code requirement for toilet clearance

The residential building code (R307.1) (P2705.1) provides clearance requirements for bathroom fixtures in relationship to the surrounding area.  The minimum distance from the center line of a toilet to any wall, cabinet, etc. is 15” while the minimum distance in … Continue reading

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Residential Code requirment for elevation of water heaters

It is not uncommon to find water heaters elevated in a garage.  The building code (M1307.3) (G2408.2)requires appliances with an ignition source to be elevated a minimum of 18 inches above the floor in order to minimize the risk of … Continue reading

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General Information regarding PEX

    It’s not often that we see a new product take over a specific sector of the construction industry.  Much like poly-woven materials appeared in the 1990’s as competition to common building paper, PEX plumbing products has emerged to … Continue reading

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