Schedule 40 PVC pipes for hot water

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Schedule 40 PVC pipes for hot water

Author: sum (FL)

I have always understood that one can only run cold water through SCH40 PVC pipes outside of the building. No PVC inside a building and no hot water through them.

What about an electric heater for an outdoor jacuzzi/spa? They are integrated into part of the pool pump/filter network and on the outlet side it's hot water that runs back to the spa.

Looking at the heater and many other pool or spa heater it's always PVC piping on both the inlet and outlet sides. Is that OK? Why is it OK to run hot water through a pool/spa heater?

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Re: Schedule 40 PVC pipes for hot water
Author: marlinman (FL) In checking, Spa heaters have a limiter set at 104 degrees. PVC pipe is rated at 140 degrees.
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Re: Schedule 40 PVC pipes for hot water

Author: LI Guy (IN)

Our previous home in NY had an inground pool with a 350,000 BTU nat gas heater. 1-1/2" copper was required to connect to the manifold at least 24" before changing to 1-1/2" PVC on both the in and out ports.

Also worth noting was that the heater was wired in through the pump timer such that it would shut the heater down at least 15 mins before the pump turned off, so it had a cool down period that prevented the water getting too hot for the PVC pipe.

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Not a plumber by trade but a fierce DIYer

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