Originally Posted by
Jerry McCarthy
So Jerry P, Florida allows the PTRV drain line to terminate into the WH's drain-pan? The IRC 2006 and California Plumbing Code do not.
Jerry Mc.,
"The IRC 2006 ... do not."???
Where it that prohibited?
From the 2006 IRC.
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P2803.6.1 Requirements for discharge pipe. The discharge piping serving a pressure-relief valve, temperature relief valve or combination valve shall:
- - 1. Not be directly connected to the drainage system.
- - 2. Discharge through an air gap located in the same room as the water heater.
- - 3. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.
- - 4. Serve a single relief device and shall not connect to piping serving any other relief device or equipment.
- - 5. Discharge to the floor, to an indirect waste receptor or to the outdoors. Where discharging to the outdoors in areas subject to freezing, discharge piping shall be first piped to an indirect waste receptor through an air gap located in a conditioned area.
- - 6. Discharge in a manner that does not cause personal injury or structural damage.
- - 7. Discharge to a termination point that is readily observable by the building occupants.
- - 8. Not be trapped.
- - 9. Be installed to flow by gravity.
- - 10. Not terminate more than 6 inches (152 mm) above the floor or waste receptor.
- - 11. Not have a threaded connection at the end of the piping.
- - 12. Not have valves or tee fittings.
- - 13. Be constructed of those materials listed in Section P2904.5 or materials tested, rated and approved for such use in accordance with ASME A112.4.1.
In fact, the reason this now shows Table P2904.5 is for that specific purpose - because the T&P was discharging to the drain pan and the drain pan line *was not* suitable for handling that hot of water: "
- - 13. Be constructed of those materials listed in Section P2904.5 ... "