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Around here in some towns you cannot use CPVC on the TPRV extension. Over the winter I renovated a home. 100% new plumbing. All the old cast iron drains were replaced with PVC and the galvanized water lines were replaced with CPVC. On the new water heater I had CPVC on the TPRV extension. When the county came in to inspect they made me replace the extension with metal. It is a real head scratcher, here is a house with ever inch of water line made of CPVC and yet the extension had to be metal.

I suspect part of the reason was so they could charge me for another inspection to come back and confirm it was replaced w/ metal. $50.

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Around here in some towns you cannot use CPVC on the TPRV extension. Over the winter I renovated a home. 100% new plumbing. All the old cast iron drains were replaced with PVC and the galvanized water lines were replaced with CPVC. On the new water heater I had CPVC on the TPRV extension. When the county came in to inspect they made me replace the extension with metal. It is a real head scratcher, here is a house with ever inch of water line made of CPVC and yet the extension had to be metal.

I suspect part of the reason was so they could charge me for another inspection to come back and confirm it was replaced w/ metal. $50.

IL State Plbg Code specifies metal ext. pipes only. Sect 890.1230 d) 3)

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When the county came in to inspect they made me replace the extension with metal. It is a real head scratcher, here is a house with ever inch of water line made of CPVC and yet the extension had to be metal.

If you read the pressure/temperature specs on the CPVC pipe, you'll see that they are lower than the same specs on the TPRV.

Marc

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There are plastic pipes manufactured specifically to be used as TPR extensions. I think all of the what-if scenarios that deal with this are silly. I bet it performs just as well as metal pipe when/if a TPR activates.

ONE TEAM - ONE FIGHT!!!

Mike

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There are plastic pipes manufactured specifically to be used as TPR extensions. I think all of the what-if scenarios that deal with this are silly. I bet it performs just as well as metal pipe when/if a TPR activates.

ONE TEAM - ONE FIGHT!!!

Mike

From yesterday's job, tank installed by a plumber. I'd be a fool to call out all the plastic discharge pipes I see, lots of them.

Click to Enlarge
tn_2012615151658_pipe1.jpg

20.9 KB

Click to Enlarge
tn_2012615151730_pipe2.jpg

29.39 KB

100 degrees C is 212 F.

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There are plastic pipes manufactured specifically to be used as TPR extensions. I think all of the what-if scenarios that deal with this are silly. I bet it performs just as well as metal pipe when/if a TPR activates.

ONE TEAM - ONE FIGHT!!!

Mike

From yesterday's job, tank installed by a plumber. I'd be a fool to call out all the plastic discharge pipes I see, lots of them.

Click to Enlarge
tn_2012615151658_pipe1.jpg

20.9?KB

Click to Enlarge
tn_2012615151730_pipe2.jpg

29.39?KB

100 degrees C is 212 F.

...........I agree, however I would say something about the WH laying on its side[:-monkeyd.............Greg.

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