Determining pump size for my pool?

Question

I'm trying to determine what size 2-speed pump to buy for my pool. I'd like to reduce my overall electric bill and low-speed filtering sounds appealing. I'd probably only use the high speed for the SPA. I've got an approx. 25,000 (guestimated volume) in-ground pool/spa combo that's something less than 7 years old (new house to us, previous owner had it installed, no other info available). It's currently got 2" PVC plumbing connected to a 2HP pump driving a 300sqft cartridge filter that normally runs about 15 PSI in the filter, but goes as high as 25 when the valves are set for the spa. There's about 20-25ft separation between pump and the furthest return and the pump is about 2-3 ft above the poolwater level. I run a Hayward Viper pressure side cleaner on a booster pump. What more do I need to know in order to determine which pump to buy (just getting a 2 HP max 2-speed is too simple an answer, I'm complicated that way...).

Answer 1

I'm actually surprised at the size of pump in there. A 1.5 hp would have sufficed, given the information you supplied. We built many pool/spa combos and never had an issue with using a Hayward Superpump 1.5. Our plumbing arrangements sound similar to what you have. This spa isn't an 8 person monster is it? Usually the add on spas are 4-6 and the number of jets only require a 1.5, but we have, on request put in a 2hp. Those customers can barely stay in the tub when it's on hi speed. You almost need seat belts and a helmet.

Answer 2

According to the NSPI (National Swimming Pool Institue) you should be able to turn (filter your entire gallonage) over a swimming pool in 8 hours. Doing some handy dandy math you need a pump that can work 3125 gallons per hour. A 1 1/2 HP pump will pump 4320 per hour more than enough. to cover an eight hour period. The only reason why I would consider a 2 speed motor is if your Electric Utility offers a rebate. But since that 1 1/2 will turn your pool over in 6 hours there is no reason really to run it all day.

Craig
http://www.arthurspools.com

Answer 3

Going with the 2-speed pump is the best!!!! It saves energy and wear and tear on the pump. I have a somewhat smaller pool(11k)
and I run mine for two hours on high and then three hours on low every day!!! The best filtering gets done on the low speed.The 2hp pump sounds like it should do the trick. Good Luck!!

Answer 4

properly settle on how uch of reistance each and each gauge style causes and then do a commerce off with expenses till you attain an optimal one.i imagine %conduit works bests- u might want to also want to attempt teflon tubing.