Hi Guys. I know you probably get this question every day and I apologize. I've tried to do a lot of research and I just need some assistance since I think I'm getting conflicting information.
I'm attempting to find a good replacement VS pool pump. I've been reading a ton about pipe sizes and head loss and sort of understand that. Here's my concern: I know the recommendation is to use 2" plumbed return lines, but unfortunately we have 1.5" lines. We do have 2 of them though, one for the skimmer and one from the deep end. They combine at a Jandy valve and then go into the pump from there. All those are 1.5" lines as far as I can tell. I know that having multiple flow lines makes the max flow go up, but doesn't the fact it gets combined into one 1.5" pipe towards the end reduce the flow back down to effectively 1 return line? Or am I thinking about that wrong?
Secondly, pending the outcome of this thread I think I had settled on one of these pumps:
SuperPump VS Amazon.com : Hayward SP2600VSP Super Pump VS Variable-Speed Pool Pump Energy Star Certified (Discontinued by Manufacturer) : Swimming Pool Water Pumps : Patio, Lawn Garden
MaxFlo VS Amazon.com : Hayward SP2302VSP Max-Flo VS Variable-Speed Pool Pump Energy Star Certified : Patio, Lawn Garden
However, they appear to be identical as far as I can tell as far as features go; if anything, the MaxFlo seems better even at a lower cost since a calculator I found indicates it has a lower running cost. Is one particularly better than the other?
30,000 gal rectangular pool
2 1.5" return lines, maybe about 30 total horizontal feet to the pad, and 13 feet rise for the drain and 3 foot rise for the skimmer (pad/pump is about 1' off the ground). About 3 bends for each return line.
current motor is an old AOSmith Century Centurion 1081, 3/4 HP, SF 1.5. There's no info on the pump itself that I can see.
If it helps, I've attached a picture of the current pad. The middle pump is a booster which we don't use. (would it help any to remove it?)
Let me know if you need some more information, and thanks in advance. I really appreciate it.