504.6 Requirements for discharge piping. The discharge
piping serving a pressure relief valve, temperature relief valve or combination thereof shall:
Not be directly connected to the drainage system.
Discharge through an air gap located in the same room as the water heater.
Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.
Serve a single relief device and shall not connect to pip- ing serving any other relief device or equipment.
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.
Discharge in a manner that does not cause personal injury or structural damage.
Discharge to a termination point that is readily observable by the building occupants.
Not be trapped.
Be installed so as to flow by gravity.
Not terminate more than 6 inches (152 mm) above the floor or waste receptor.
Not have a threaded connection at the end of such pip- ing.
Not have valves or tee fittings.
Be constructed of those materials listed in Section
605.4 or materials tested, rated and approved for such use in accordance with ASME A112.4.1.
There is nothing wrong with the way that relief valve is plumbed. You can reduce with a bushing from the tank 3/4" to 1/2" - You can’t reduce on the output side of the relief valve- If the valve is 3/4" than the out put must be 3/4". Also either way they aren’t allowed to run up hill.
That is where I’m stuck Roy. So I guess we’re not going to come to unanimous Decision. The discharge pipe is smaller than that outlet opening on the valve how is that okay It is that way to the very end of the pipe it is that way to the very into the plate
Please anybody else who has not commented feel free to give your opinion the more the merrier I would like this lady to be positive but now I think this will confuse her more I would like this lady to be positive but now I think this will confuse her more
The outlet on the valve is considerable smaller than the NPT opening of the discharge side. That valve has a NPT of 1/2". The discharge pipe has a 1/2" male adapter on it. What else do you need to know about this…It’s OK.
I guess I am missing something if there was no pipe connected to the relief valve there would be in about an inch hole there It is reduced to about a half inch how is that correct