PVC sizing confusion

september

New member
Apr 26, 2017
2
Chicago, IL
I will have my pool installed in a few weeks. 12x24 Doughboy with a 1hp Hayward xstream cc10092stl pump/cartridge filter that has 1.5" input/output and a 150k btu Hayward h150fdn heater that has 2" input/output so I am a bit confused on what proper size PVC piping will be needed in this setup?
Pool will have 1 return/1 skimmer. Should they run 1.5" pvc pipes from pool to the pump/filter then 1.5" with a 2" adapter to the heater and then another adapter 2" to 1.5" back to the pool? Or 2" PVC everywhere with reducers for 1.5" where needed?
 
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september

New member
Apr 26, 2017
2
Chicago, IL
I will have my pool installed in a few weeks. semi inground 12'x24'x52" Doughboy with a 1hp Hayward xstream cc10092stl pump/cartridge filter that has 1.5" input/output and a 150k btu Hayward h150fdn heater that has 2" input/output so I am a bit confused on what proper size PVC piping will be needed in this setup?
Pool will have 1 return/1 skimmer. Should they run 1.5" pvc pipes from pool to the pump/filter then 1.5" with a 2" adapter to the heater and then another adapter 2" to 1.5" back to the pool? Or 2" PVC everywhere with reducers for 1.5" where needed?
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
23,645
San Dimas, CA (LA County)
Calculating flows is beyond me. But look carefully at that pump and filter. Sometimes the fittings are dual-sized - ID fits 1.5", OD is the same as 2" so you can use a coupling on the outside. If so, you could use 2" throughout.
Let's see what @JamesW has to say
 

JamesW

TFP Expert
Mar 2, 2011
19,433
I would do 2" everywhere and reduce as needed.

I would definitely not do a single speed pump.

I would go two speed or variable speed.