Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 27

Thread: Too much pump??

  1. Back To Top    #1
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Too much pump??

    Hello. New member here, been reading for a week or so. Glad to hear any advice.
    We just had a 10k gal fiberglass installed (pouring concrete monday) and now that I have the pump and filter up and going, Im afraid my pump may be too much. I am loving how quiet the pump is but getting a lot of noise from turbulence in the return right as it exits the 6-way of the filter. I have a decent understanding of hydraulics as I work in operations in an oil refinery but I am not an engineer. I can pinch my return valves back and increase the back pressure and the noise goes away and it is not there when I switch the filter to recirc. Here is what I have and what my thinking is:
    (2) 2" main drain suctions tied together under ground
    (1) 2" skimmer
    (3) 2" returns (not sure of eyeball size but Im assuming 3/4")
    Whisperflo 1.5hp
    Sand dollar SD80 (which I believe has a 1.5" 6-way valve which I suspect is causing my problem with turbulence noise due to too big of a pressure drop)
    I will try to attach a picture if it will help.
    Thank anyone who can give me any helpful advice. Should I go with a smaller pump? Change my impeller/diffuser? Change eyeball size? (though I worry about this effecting longevity of the pump).
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  2. Back To Top    #2
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Here is a picture of my set up as it is now
    Attached Images Attached Images
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  3. Back To Top    #3
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Here's the pool sans concrete, fencing, landscaping and a final contouring of the yard....getting anxious
    Attached Images Attached Images
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  4. Back To Top    #4
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    I forgot to mention that I am not getting air in the system from the suction side best I can tell as the pump strainer is 100% air free and Ive bled the top vent on the filter numerous times.
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Too much pump??

    A 1.5 HP WhisperFlo on a 10,000 gallon pool is certainly more pump than you need, and will make more noise than a smaller pump would make.

    You appear to have at least a pair of different problems, a suction side leak letting air in and noise. Each will need to be dealt with separately.

    Replacing the impeller with a smaller impeller will give you a pump which is effectively a smaller pump, which will be quieter and use less electricity. It will also reduce the noise level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  6. Back To Top    #6
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Im just not convinced I have a suction side leak because the strainer basket window is totally buble free and the pump itself is practically silent...very impressed with its noise level. The gentle churning of the water from the returns masks the pump noise completely. The noise is coming from the section of return immediately after the filters 6-way valve. I didnt ask the builder what model pump there were installing but assumed a cheapo .5hp then the guy brought over this huge filter and 1.5hp beast. I know its not thought of well but I would like to run the thing 24/7 but definitely wont be with this set up. Also I think if the noise was being caused by a suction leak pinching or closing off some returns wouldnt make it go away. Right?
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  7. Back To Top    #7

    Join Date
    May 2011
    Location
    Orange County, CA
    Posts
    696

    Re: Too much pump??

    We had a 2 HP WhisperFlo and now have a 3hp IntelliFlo on a 38K pool. The pool has a single return pipe (2") that is tee'd to four returns into the pool. I've never noticed any odd sounds from the return pipes, only the sound of the pump itself. Running the IntelliFlo at 1/2 speed makes the pump almost silent, and again, I cannot hear any sounds from the filter or return pipes. I wonder if the valve at the top of your filter is making a bunch of turbulence in the water, causing cavitation (release of trapped air in the water at boundaries). If so, it might be possible to re-plumb that valve to minimize cavitation.
    38K in ground pool with attached spa. Current equipment: Easytouch 8 (521150) with IC-60 SWCG with web control by Autelis, 1x Pentair IntelliFlo 011018 pump (for filter), 1x Pentair 2HP WhisperFlo pump (for waterfall), 2X Pentair IntelliBrite 5G 12V lights, Pentair MiniMax400 NG Heater, Pentair SMBW2060 DE filter. Zodiac Barracuda MX8 cleaner on dedicated cleaner line. Lighting/home automation controlled by Insteon/ISY-99i.

  8. Back To Top    #8
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    My thinking is that it is something with the valve in the top of the filter where my problem is but just dont really know the best route to correct it.
    Most expensive: buying a complete diff pump
    Less expensive: replacing impeller and diffuser
    Even less: replacing eyeballs
    Free: pinching return valves way down
    I also have a single 2" that it Tee'd to three 2" returns if that makes sense but they neck down to 1.5" where they connect to the pool wall if I looked at it right when they were plumbing it.
    I agree though it is turbulence caused by a pressure drop across the valve in the filter. There isnt any sharp 90's on it either, its plumbed pretty smooth and gradual until it splits into the 3 separate return lines.
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  9. Back To Top    #9
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Too much pump??

    My guess is that the valve causing the noise. You can call Pentair but I doubt there's anything they can do.

    An easy try would be to route the piping right out of the filter about a foot higher than the valve. It would change the hydraulics a little and may be enough to silence the noise without affecting the head much.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  10. Back To Top    #10
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Never thought of that. Wonder if the swcg will change it any?
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  11. Back To Top    #11
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Too much pump??

    It might and if you're planning on installing it anyway it may be worth waiting to see.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  12. Back To Top    #12
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Yeah I will definitely wait until I get it installed. Fedex tracking number says it will be delivered the 24th. Hopefully it puts enough backpressure on the return to quiet it down some. It not a terribly loud noise but I like how quiet that whisperflo is.
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  13. Back To Top    #13
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,478

    Re: Too much pump??

    I agree with the others that a 1.5 HP Whisperflo is overkill for that pool. A 3/4 HP two speed Whisperflo would been on the high side. But with dual suction and three return lines, the head loss is probably pretty low in that part of the plumbing which means the water velocity in the pipes is probably pretty high and making noise.

    What is your filter pressure?

    How many return eyeballs do you have in total or per return line?

    One thing to try is turn off two of the three return lines, the noise should go away and filter pressure rise.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  14. Back To Top    #14
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Looked at filter before I left for work this evening and it was right around 20psi
    I have 1 eyeball in each of the 3 returns
    Yes Ive closed off returns and the noise goes away. I may try putting smaller eyeballs in 1 or two of the return jets
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  15. Back To Top    #15
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,478

    Re: Too much pump??

    If it isn't too late, I would have them fix a couple things.

    Replace the pump with a WFDS-3 or 24.
    Replace the backwash valve with a 2" valve.

    This is what they should have done in the first place.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  16. Back To Top    #16
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Yeah I would like to have the 2" valve on the filter but from ive read they dont sell it that way, unless im mistaken. Doubt Ill get him to replace the pump at this point....been running it for 2 days now.
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  17. Back To Top    #17
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,478

    Re: Too much pump??

    I would ask anyway but you can always replace the impeller. It is a fairly easy and inexpensive what to downsize a pump.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  18. Back To Top    #18
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Thats probably the route I will take. Experimented a little bit this morning, pinched back the 3 return valves and it got quiet and still had plenty of water circulation. But when I did it I noticed two very small bubbles in my strainer basket window that arent there when I open them all the way. They were very small like maybe each the size of a pea.
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  19. Back To Top    #19
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    One more question that just popped in my head: could I change just my motor to a 2 speed if I wanted?
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

  20. Back To Top    #20
    tjwaggoner's Avatar
    Join Date
    May 2012
    Location
    Ashland KY
    Posts
    88

    Re: Too much pump??

    Or better yet get a variable speed motor to bolt to my pump case? Or is there a difference in impeller design?
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •