Changing pipe size from 1.5 to 2 inch?

Jaymike84

Member
Mar 6, 2021
10
Clearwater Florida
We had a pool that’s was installed two years ago that is semi recessed. It’s a 18 foot round pool and it was plumbed with 1 1/2 inch piping. I have bought solar pool heater that has a 2 inch head and seeing if I need to replace the one and a half inch pipe that is current plumbed in with 2 inch before I add the solar pool heater that is 2 inch. I have read about flow restrictions and seeing what people recommend. The solar pool heater will be installed approximately 40 feet away from where the pump is in a clear area of my property. Or can I keep the 1.5 inch and make the pipe going out to solar heater and back 2 inches? Any help is greatly appreciated
 

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Last edited:
Welcome to TFP.

No reason to replace the 1.5" pipe you already have. Just run 2" pipe for all new pipe. It will be fine.
 
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Upsize/downsize it however and wherever is most convenient for you. You will never notice the difference in flow, although it technically will be different.
 
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