Wish I had asked for help before I purchased.
I have a 4 year old ""L" shaped in-ground liner pool. 40x20 with an diving board in 8 foot deep end, and 30x20 on the "L." All of the 30x20 area is about 3.5 feet deep. Basically it is a 40x20 with an extra 20x10 foot 3.5 depth. I estimate it is about 40,000 gallons?
My PB is either not set up for the summer yet, or is retired. (can't reach by phone yet, but phone not disconnected, he does this each winter as pool building is kind of a hobby with him and he is near 70 now.) He is a great guy who came back after the first season and repaired the bottom of the deep end from water suction pockets, and put in new liner at that time, all no charge. The pool looks, and has operated great. Pump was very quite on low speed.
A few weeks ago my hayward super pump started getting loud. Now it is really loud. It is a 2-speed, 2 hp, and I think the service factor is 1.0. Model is 2615x202s. I run it 90+ percent of the time in low speed. It is mostly exposed to the hot afternoon SC sunshine although I have shaded it some. The pool stays "open" year round, with the pump running in the winter to create clorine and keep the water turning over, although less than in the summer. There is no pool heater hooked up.
The pump pad is about 15 feet from the corner of the deep end, about a foot above the water line.
I also have an intermatic 40k salt cell set up that just needed the cell replaced for the first time. (I cleaned the original 2x a year but it finally slowly failed.)
There are no special water features or spa with the pool. The pool has a 5 foot, front to back, set of fiberglass steps that we use as the main entry point to the pool.
There are 3 skimmers total, and one main drain in the bottom of the 8 foot deep area. Each skimmer and the main drain has a ball joint shut off, all going to a main shut off, and then directly into the hayward 2 speed super pump. Two of the skimmers are on the far wall in the shallow end, 1 skimmer is on the far wall in the deep end.
I made a note when the pool went in that all pvc used around the pool was 1.5 inch. I didn't know how important that was at the time and didn't even ask about using 2 inch.
There is a run of two inch pipe going from the pump into the hayward pro 500 pound sand filter, (4.9) and a little 2 inch coming out of the filter, through the salt cell, and then reduced back to 1.5 inch for the returns.
The returns have a main splitter, with 6 returns going out one line and down the 40 foot side of the pool, and the other split return line going to the steps 2 return jets, which are in the shallow end, as far from the pump pad as you can get. So 8 returns total out of a two line spliter, after the salt cell.
Knowing that my current pump will not last much longer as it is getting pretty loud, and since I couldn't reach my PB, I went on a hunt for a new pump. I was pretty much convinced that the 2 hp might have been a bit much as it sure seemed to strain some the little bit I ran it on high speed. Low speed was pretty smooth.
So I just bought, and received the tracking number today, for a WFDS-6, 1.5/2.0 hp, 2-speed Whisperflo to replace the 2 hp hayward. I learned that the whisperflo should put out about the same flow, maybe even a tad more, than the higher hp rated super pump. The WFDS-6 is the pentair full rated 1.5 model, that they also sell as an uprated 2.0 hp, and I think the total rating came out to 2.2 vs 2.0 for the hayward.
I almost went with the 1.0/1.5 model but I wanted to make sure I moved enough water through the salt cell to generate clorine and I don't know if there is a minimum flow through the cell to get the full effect, and I need the clorine to keep coming with such a large pool......that and because 2 of the skimmers and 2 of the returns are so far from the pad.....
Anyway, I think I learned just enough to be dangerous, and if anyone has any suggestions about my move from the 2 hp super pump to the 1.5 whisperflo, I would love to hear them, including anything I need to watch for when actually swapping out the pump assuming my PB guy can't come out and do the swap out for me. I did check first and make sure the new whisperflo has a manual switch on the motor, as does my current hayward 2-speed.
Also, am I a candidate for some type of flexable tubing to go either into, or out of, the new pentair?
Thanks for any help, this is my first post here.