I went to get the 2" pipe to begin rebuilding my pad plumbing ahead of a new pump install (various leaks at the pad plumbing).
Currently, I have 2 1.5" pipes (skimmer and vacuum) leading into a Jandy that feeds the 1HP pump, a mix of 1.5" and 2" pipe/elbows/reducers into a 2" multiport, a return that feeds another Jandy, which feeds 2 1.5" returns (water feature and return jets).
My new 2HP works with both 1.5" and 2" pipe but the HD employee (who is also a 40-year plumber by trade) said you cannot bring 1.5" into a 2" without creating air or cavitation. He said I need to stick with 1.5" pipe to match the suction and pressure lines otherwise I'm only pulling 1.5" of water into a 2" pipe and it won't pressurize properly.
He correctly indicated that going 2" to 1.5" at the pressure side will just create more pressure to the returns and wouldn't be a problem, but still advised to stick with 1.5" all around.
(A) Can I do this without worry?
(B) Is 2" better for a 2hp pump, even with 1.5" suction and pressure lines?
(C) Would it be best to convert 1.5" to 2" once the water exits the Jandy on the way to the pump or at the vaccuum lines before the Jandy?
(D) Will the increased HP or pipe size allow me to utilize both skimmer and vaccuum via Jandy control?
My current setup will not allow me to have partial vaccuum and partial skim at the same time. Not sure why but I can Jandy to just one or the other. Also, the filter is DE capable of 72GPM.
Thanks, theres nothing worse than having a plan to execute tomorrow morning and an "expert" making me 2nd guess
*pic below
Currently, I have 2 1.5" pipes (skimmer and vacuum) leading into a Jandy that feeds the 1HP pump, a mix of 1.5" and 2" pipe/elbows/reducers into a 2" multiport, a return that feeds another Jandy, which feeds 2 1.5" returns (water feature and return jets).
My new 2HP works with both 1.5" and 2" pipe but the HD employee (who is also a 40-year plumber by trade) said you cannot bring 1.5" into a 2" without creating air or cavitation. He said I need to stick with 1.5" pipe to match the suction and pressure lines otherwise I'm only pulling 1.5" of water into a 2" pipe and it won't pressurize properly.
He correctly indicated that going 2" to 1.5" at the pressure side will just create more pressure to the returns and wouldn't be a problem, but still advised to stick with 1.5" all around.
(A) Can I do this without worry?
(B) Is 2" better for a 2hp pump, even with 1.5" suction and pressure lines?
(C) Would it be best to convert 1.5" to 2" once the water exits the Jandy on the way to the pump or at the vaccuum lines before the Jandy?
(D) Will the increased HP or pipe size allow me to utilize both skimmer and vaccuum via Jandy control?
My current setup will not allow me to have partial vaccuum and partial skim at the same time. Not sure why but I can Jandy to just one or the other. Also, the filter is DE capable of 72GPM.
Thanks, theres nothing worse than having a plan to execute tomorrow morning and an "expert" making me 2nd guess
*pic below
