When purchasing a new in-ground swimming pool, you need to determine what size pool pump is required. There is a tendency to purchase a bigger pump than what is necessary because people think bigger is better. However, not only does this lead to higher operating costs, but you may also be overpowering your filter system. As a general rule, you should have a pump that filters all the water in a pool in an eight-hour period. This page will show you how to select a pump that filters all the water in your pool in eight hours.
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Bftigger Posted: 9/25/2016
We just bought a house with a pool. The guy who was "maintaining" it for the prior owner did a crap job (IMO, long story).Anyways... We are going to replace the pump and filter sometime soon, but not sure what to go to. Would love some input.
Pool is 12,000 gallons (has 1 wall skimmer & 2 floor drains, all in the deep end)
Pump is 3/4hp (looks old as the pump filter is inline separate from the pump)
Sand Filter is 200 lbs
Salt chlorinator cell (T-15)
What is the largest pump and filter we can go to? Which filter is more efficient and user friendly (was considering switching to a cartridge or DE)?
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Antman4hg Posted: 9/22/2016
I have a pool 20x30 3ft to 8ftI have a Hayward setup 1hp motor
And a sand filter. 75gpm. Do I need a bigger setup for this size pool.
It's about 28000 g
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InyoPools Product Specialist Dennis R. Posted: 9/7/2016
Blues - I would recommend replacing your motor with a 1.65 HP variable speed motor. It cost a little more initially, but can pay more itself in reduced operational costs in just over a year. Here's the link to variable speed motors.Reply
Blues Posted: 9/5/2016
I have a 13500 Gal pool. The main pump motor is currently a 1 HP Marathon with a SF=1.25 which has become very noisy (screech) and should be replaced. I added a passive solar heating system last spring, left all the other equipment unchanged. Should I consider upgrading the pump and motor to 1.5HP or larger to accommodate the new solar system? Is a larger HP pump for the passive solar system even necessary? System currently runs 8 hrs/day, approximately 5-6 hrs/ day with solar heat.The filter is a Tagelus TA-50 (50GPM) sand filter. Head pressure per your video instructions yield 17ft. Other option would be to install a VS pump, but not sure if extra expense is worth it. Cheap option is to just replace the motor.
Your thoughts please.
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InyoPools Product Specialist Dennis R. Posted: 8/24/2016
WTF - Those are typos. They should read GPM. Thanks for the catch.Reply
WTF Posted: 8/23/2016
I understand GPM (reference Step 10), but what is GFM as referenced in Step 11?Reply
InyoPools Product Specialist Dennis R. Posted: 8/23/2016
Slamingsam - I'm not sure why your 2 HP motor is not enough to power your cleaner. In fact, if your motor's Service Factor (SF) is 1.3 or 1.5, your pump is larger. Actual or total HP is the product of HP and SF. Try partially closing your main drain valve to divert more water flow to the suction port. Did you downsize the impeller (and maybe diffuser) when you changed the motor? If you are still considering a larger pump, I would recommend a 3 HP variable speed pump or motor. They cost a little more upfront but offer considerable savings in operational costs.Reply
Slamingsam Posted: 8/22/2016
I have a20x40 with 71/2 @ the deep end. just bought a 2hp Haywood motor. Had a Haywood"King Ray" that stopped working. Bought a "Extreme Power" it's like a Kreepy. The new 2hp. motor hardly moves the new "Extreme" cleaner. I did have a 3or 31/2 hp motor. The 2hp just doesn't cut it. Any ideas on what to do. Looking going to 3hp motor. I hate to lose the money spent on the 2hp motorReply
InyoPools Product Specialist Dennis R. Posted: 8/13/2016
Hawt in Texas - For your size pool, I would recommend a larger pump. If you can cover the initial cost, I would get one of the larger 3 HP variable speed pumps then run it at what works best for your system. You will save a high percentage of your operating costs.Reply
Hawt in Texas Posted: 8/12/2016
Hi. My spa level dropped 6 inches although I did nothing. Upon further investigation, my pump motor was trying to turn-on for 10 seconds every 5 mins. I cut the power, and determined it is not the capacitor nor the booster capacitor. I'm afraid it is the pump. I have a 1.5 hp Whisperflo feeding into a cartridge only filter (System3, Modular Media, Model #S8M150) that has Maximum Flow Rate of 125 gallons per minute. The pool is 41,500 gallons with an attached spa of 4,500 gallon. No water features. 2 skimmers, 1 main drain. The average Feet of Head is 47. It has always been LOUD, but it worked. So, I never replaced it. Probably looking at 95 GPM. I just want to make sure the 1.5 hp will do the trick or if I should go with a stronger motor?Reply
InyoPools Product Specialist Dennis R. Posted: 8/10/2016
theprofessor - I'd go with the next size up on your pump, the Hayward Power-Flo II 3/4 HP Single Speed Pump and match that with a Star Clear Plus 75 Sq Ft. Filter 1 1/2" Ports.Reply
theprofessor Posted: 8/10/2016
hello! i have a 3K gallon in-ground swim-spa with 25 feet of suction head and 15 feet of line to rooftop solar (1.5in lines). we're using a 50sqft cartridge filter and a SCG. I have one skimmer only and would like to add a vac-sweep line (+25 more feet of head) when we replace the liner in a few months. I'm also in need of a new pump -- presently it's a self-priming 1/2HP pump (SP1750), but considering the added solar and to-be-added vac-line, we'll likely need an upgrade. could you suggest a range to investigate? A few models/combos? we might need to replace the cart-filter, too, because of flow-rates (OK if we do). variable speed might be nice, but they seem like they are a bit too large flow-wise for my application. The present combo seems to work, but seems a bit underpowered with the solar addition. thanks for any insight and suggestions you can lend.Reply
InyoPools Product Specialist Dennis R. Posted: 7/11/2016
jellybean - Sand in pools usually comes through cracks in the piping inside your filter. You may have to remove the sand in your filter to check for cracks in the laterals, the hub that the laterals are attached to, and the vertical standpipe. Also, some standpipes have an O-ring at the top of the pipe. See the parts list for your filter. If applicable, check that O-ring for damage.Reply
jellybean Posted: 7/9/2016
I have a 12000 gallon pool... part in ground part above ground.. we have a 1.5hp pump and a 24" sand filter... should I have sand in my pool?Reply
InyoPools Product Specialist Dennis R. Posted: 7/1/2016
Mark V - If you currently have a 1.5 HP pump, the Hayward EcoStar at 2.7 HP might be somewhat larger than you need. Unless you are planning to add addition features, you might consider something like the PureLine Prime Variable Speed Pool Pump 1.65 HP that will be out in July.Reply
InyoPools Product Specialist Dennis R. Posted: 7/1/2016
Zalde - For a pool your size and expense, I would have a pool builder do a complete analysis of your pool requirements including the total length of piping, pipe sizing, number of elbows, water features, etc. There are many factors involved that we only estimate for the average pool system.Reply
Mark V Posted: 6/29/2016
Using your sizing guide, I determined my GPM = 57 and Avg Ft of Head = 45' and I have 1.5" lines. I have an old 1.5 hp Jacuzzi pump and would like to upgrade to a variable speed. Would the Haywood EcoStar work for me? If I read their charts right, I could run efficiently at 2400 rpm. Thanks!Reply
Zalde Posted: 6/29/2016
Guys, I really need your help. There's this special someone of mine, who asked for my help. This is the situation, they're planning to build an Olympic Pool ( Length 50m, Width 25m, Depth 2m, Volume= 2 500 000 Liters). How can we choose the correct pump for its filtration system? PLEASE HELP. THANKSReply
InyoPools Product Specialist Dennis R. Posted: 6/28/2016
Quincyrocks - For your size pool and piping, I would recommend upgrading to a 1 HP pump. Look for a pump with a 1 HP total HP (THP) rating. See our guide on "How To Understand True Pump Horsepower - Up Rated vs Full Rated".Reply
InyoPools Product Specialist Dennis R. Posted: 6/27/2016
Waterboy - You should be alright with a 1 1/2 HP pump for your size pool and 1 1/2" pipes. 2 HP would be too large for your pipe system. If you go to a 1 1/2 HP pump, make sure you select a pump with 1 1/2 Total HP (THP). See our guide on "How To Understand True Pump Horsepower - Up Rated vs Full Rated". Also, make that your current filter can handle the increase in GPM generated by a 1 1/2 HP pump.Reply
Quincyrocks Posted: 6/27/2016
I need to replace my pump which is currently a 3/4 HP Hayward super. I'm wondering if I should go up to a 1 HP, as I recently added a Hayward 350btu heater.The pool is in ground, 10,000 gallons with a pro grid DE36 filter and the aforementioned heater. The skimmer is 36 ft from the pump and the drain is 53 ft. I had to install a bypass to run the pool without the heater when necessary, which made for some fancy piping. So there are about 8 90 degree turns between all the equipment, if that matters. Also, the lines to the pool are 1.5 inch but the piping between the equipment is 2 inch. Thanks.
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Waterboy Posted: 6/26/2016
HiI have a 16' x 32' True L (L is an additional 8'w x 10'L x 3'd) in-ground pool w/no main drain. The deep end slopes down to 8'. I've been told that the pool capacity is 27,500 gal.
I moved the pump and filter ~75 ft from where it was originally located. I use 1.5" PVC schedule 40 pipe and kept the piping and filter/ pump ~2.5 ft below the water line. Everything is working fine however the two skimmers do not seem to be working very effectively (lot's of junk/ foam on the surface of the water). I had replaced the pump last year with a 1HP Hayward Super Pump however, I'm wondering if I need to go to a larger pump. I've calculated the average total head to be ~55' (110' ft/2). I think this correct...the second skimmer attaches to the first one and then one line runs back to the pump/ filter.
If I go w/a 1.5HP motor, will that fix my problem? I've noticed that the limit on 1.5" PVC is about 60 PSI? If I need to go to a 2HP pump, it looks like I'll need to change the pipe to 2"??
Thanks,
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InyoPools Product Specialist Dennis R. Posted: 6/22/2016
TBtooks - Yes, you can use a 1.5 HP pump for your pool. I would hedge a little and buy an uprated 1.5 HP pump rather than a full rated pump. The actual or Total HP (THP) will be closer to 1.5 HP than the full rated pump which can be 2 HP or greater. THP = the listed HP times the motor Service Factor (SF) listed on the motor label. See our guide on "How To Understand True Pump Horsepower - Up Rated vs Full Rated".Reply
TBrooks Posted: 6/21/2016
Hello, We are trying to figure out if we can use a 1.5 horse power pump on our pool. The cooper pipe that connects to the pump is 1.5. Is this large enough to use a 1.5 HP pump? Right now we have a 1 HP pump but our pool is large and it doesn't seem to circulate the water very well. Any information you can provide would be appreciated. Thank you.Reply
InyoPools Product Specialist Dennis R. Posted: 6/20/2016
DurValFarm - The C5030 is definitely overkill for your system. But you can never have a filter too large. It will last longer and not require as frequent cleaning. Does your system still have good flow? If not, your problem may be somewhere else in the system like a clogged pump impeller. See our guide on "How to Correct Low Water Pressure in Your Pool System".Reply
DurValFarm Posted: 6/18/2016
We have a MaxFlo 1 hp pump and just got a Hayward C5030 cartridge filter installed. Our pressure is now virtually non-existent. Could the filter be too large for the pump or needs of the pool? Our pool is IG 15,000 gal.Reply
InyoPools Product Specialist Dennis R. Posted: 6/14/2016
pump stopped - See our guide on "How To Troubleshoot a Pool Pump Motor - Motor Overheated" for possible causes of a motor failing.Reply
InyoPools Product Specialist Dennis R. Posted: 6/13/2016
Sam - The PHPM is the newer version of the PHPU. I don't believe it is a drop-in. Some plumbing adjustments may be required. If your pump wet end is still good, you might consider just replacing the pump motor. See our guide on "How To Replace the Motor on Your Pool Pump".Reply
InyoPools Product Specialist Dennis R. Posted: 6/12/2016
wahoo - Yes, we generally recommend a 1 HP above ground pump for an 18 ft round AG pool.Reply
Anonymous Posted: 6/11/2016
i have a 25000 gal pool the hayward pump just stopped working. had it replaced two years a go.Reply
Sam Posted: 6/11/2016
I have a Jandy PHPU 1.5 pump that needs replacing. I don't see that model in your catalog. Can you recommend one like it? Thanks.Reply
wahoo Posted: 6/10/2016
We have an 18ft round above ground pool with a 1.5 hp (70gpm) Hayward pump that came with the house we just purchased. The pump is loud and we are guessing it's not suppose to be. we are considering replacing the pump. My question is if it would be OK to replace with the 1 HP version of the pump. The pump sits about 10 feet from the skimmer below the water level.Reply
InyoPools Product Specialist Dennis R. Posted: 6/10/2016
adpinc - Your filter size is more than adequate for your 1.5 HP pump. Most pumps operate with some bubble in the top of the strainer basket. As long as you aren't seeing bubbles continuously coming out of the return ports, you should be alright there. If you haven't changed your sand in 5 years, you might change it now. Lastly, tap your gauge slightly to see if it adjusts. Sometimes they go bad.Reply
adpinc Posted: 6/8/2016
Hi - I think my pool pump is oversized. My filter pressure after backwash is about 20psi. My head run is about 35' average. There are a lot of bubbles in the basket of my Hayward 1.5hp Super pump, but there doesn't appear to be a leak anywhere on the suction side. I can't seem to figure it out. My filter is pretty large, it is a sand filter with 3.14sq ft of area, and can handle 20gpm/ft^2 or around 60gpm. Is my pressure ok in the filter?Reply
InyoPools Product Specialist Dennis R. Posted: 6/7/2016
Elevated equipment - I'm not sure on the impact, but it sounds like you are adding 8 feet of head onto your calculations. I would get a full rated motor to be on the high side of the listed HP. Or you might consider buying a VS pump.Reply
Anonymous Posted: 6/6/2016
My pool equipment is 8 ft higher in elevation than my skimmer and main drain. How does that factor into the equation to determine filter pump size and pipe diameter?Reply
InyoPools Product Specialist Dennis R. Posted: 6/6/2016
Jbizzle - If you are looking to save on operational costs, I would recommend getting a 1.5 VS pump like this PureLine 1.5 H.P Variable Speed Pool Pump. It is currently on sale and can save you up to 80% on operational costs. For more information on VS pumps see our guide on "How to Save Money Using a Variable Speed Motor".Reply
Jbizzle Posted: 6/5/2016
Correction 1.5 HP Pentair ChallengerReply
Jbizzle Posted: 6/5/2016
I have about a 14k gallon in-ground pool with 1 skimmer about 8 ft from the pump. A Pentair FNSP 48 DE filter, 3 return lines all feeding from 1 pipe that runs down the side of the pool. Pipe length about 35 feet. The current pump looks to be a Pentair 1.5 HP Dynamo. I'm looking to replace it due to the 150 dollar a month cost to run it for 12 hours a day. Any suggestions? The only thing that runs on it is a Zodiac G3 suction side cleaner. Any help appreciated.Reply
InyoPools Product Specialist Dennis R. Posted: 6/5/2016
Chris - If you are replacing your pump, you would want to get a VS pump that has the same upper HP so that you can drive your spa and water accessories at full power.Reply