Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 15 of 15

Thread: renlacing pump, which do I need?

  1. Back To Top    #1

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    renlacing pump, which do I need?

    ok guys so I became a pool owner 3 years ago when we bought our first house. The pool was on its last legs all around. Ancient filter, old pump, decking moving away from pool, coping cracked and loose (flagstone), rusty fence around pool and we have a retaining wall on one side that has sagged on either side of the pool.

    So the pump worked and we replaced the filter with a pentair DE filter. I think its 48sq ft I need to check. Recently the pump has given me issues and I opened it up to find broken impeller and diffuser...seeing as how the parts for this pump are obsolete, I am debating if I need to spend $150 for hard to find parts or upgrade to a new pump.

    problem is I am not sure what to get specs wise.

    I am interested in the electricity savings of a 2 speed pump but am unsure of its right for my application.

    My pool is a kidney pool. Deep end is about 8 ft deep, shallow end 3ft. The width of the deep end is 13 feet and the shallow end 20 feet. Finally the length of the pool is about 32 feet. Using the pentair calculator, I estimated my pool volume to be right around or below 20,000 gallons. Is this correct?

    My equipment pad is about 6 feet away from the skimmer.

    As far as pumps I only looked at the Pentair Superflo 1.5HP which is about $300 on ebay. Other than that I don't know what other pumps are good/recommended. We have a limited budget so I think the Variable speed pumps are out of the question for now since the pool will need work soon.

    Do I stick with a 1.5HP? Im pretty lost...and seeing as how my pool guy quoted me at 900 for the 1.5HP Superflo which I found for 300, I think I can DIY and save me the money.

    here are some pics for ref.








  2. Back To Top    #2

    Join Date
    Jul 2013
    Location
    Mesa, Arizona
    Posts
    86

    Re: renlacing pump, which do I need?

    In my opinion sticking with the 1.5 HP for your size of pool is just fine! And plumbing and wiring in a replacement pump is not difficult at all!!
    Mesa, AZ Spillover spa and inground pool, 12,500 G, pebble finish, Hayward C5030 (525sf) Cartridge Filter, Hayward EcoStar VS Pump, Installed July 2013, Hayward SWG T-Cell-15, Trident UV (I know, I know....was installed before I found this site!) Rock grotto waterfall, LED ColorLogic lighting, 110 BTU Heat Pro Electric Heat Pump, Maytronics Dolphin Supreme M5 cleaner, TF-100 test kit with Speed Stir.

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: renlacing pump, which do I need?

    Why stick with a 1.5HP for a basic pool if a cheaper/small pump would be plenty?

    You pump is actually a 1.5HP * 1.3SF = 1.95 SFHP pump ... which is easily double the size that you need.

    A 2-speed will certainly save you money on electricity.

    Is your current pump wired for 115V or 230V?
    If 230V, I would suggest the Pentair Superflo 1HP 2-speed ... which you should be able to find for right around $400.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    Quote Originally Posted by jblizzle
    Why stick with a 1.5HP for a basic pool if a cheaper/small pump would be plenty?

    You pump is actually a 1.5HP * 1.3SF = 1.95 SFHP pump ... which is easily double the size that you need.

    A 2-speed will certainly save you money on electricity.

    Is your current pump wired for 115V or 230V?
    If 230V, I would suggest the Pentair Superflo 1HP 2-speed ... which you should be able to find for right around $400.
    thanks jblizzle, thats kind of what I was thinking, the 1.5hp was overkill. Can you explain the math you did there and what does SF and SFHP stand for.

    also, I am not sure what the pump is wired for. I believe it to be 115 but am unsure. If thats the case what do I need to do?

    another question is how would I use the 2 speeds? why are they better? I can just see myself always running the pump on low speed...

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: renlacing pump, which do I need?

    SF = Service Factor ... it is a game that manufacturer play with HP ratings. The true power is the HP times the SF. So often they have 2 motors that are identical, but one may be 1HP with 1.65SF and another will be 1.5HP with a 1.1SF. In reality they are identical.

    What breaker feeds your pump? Lets verify that first. Finding the 115V 2-speed pumps is a little difficult.

    On low speed the pump moves 1/2 the water as on high speed (or equivalent single speed motor) but uses 1/4 the power. So even if you double the run time on low to move the same water, you still save 50% of your electrical usage. Generally you want to run on low most all the time and only use high when you need to vacuum or clean the filter.

    Many of the pumps come with a manual switch on them for you to select the speed, or you can add another timer to automatically switch speeds.

    If you decide against a 2-speed, I would certainly look for nothing bigger than a 3/4-1 HP single speed since it does not appear that you have any need for high flow rates.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  6. Back To Top    #6

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    here is another question...

    since the motor is still good there is part of me that feels bad just throwing this out just because I can't find the 1.5hp impeller....which lead me to do another search and found this 1HP impeller on amazon...

    http://www.amazon.com/Eagle-Pump-Imp.../dp/B004YLI3FK

    is it possible to run the pump with this impeller? or do I risk doing any damage? my thinking here is to get this pump to last until the spring time when I can take my time research more and also get some quotes on the new deck/tile/plaster work. The pool hasn't been running for about a week now since I don't want to damage the motor.

  7. Back To Top    #7
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: renlacing pump, which do I need?

    Actually, there is no problem with using a smaller impeller on your motor and that will lower the power usage some.
    You can NOT use a larger impeller than the motor or you will damage the motor.

    That said, I have not confirmed that is the correct part, but if you are pretty confident then that is certainly the cheapest path forward to get things running.

    WHOA!!!! $50 for an impeller??? That is double what most impellers usually are.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  8. Back To Top    #8

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    yea...i know it seems pricy. A local pool store quoted me at $75 for the diffuser and $75 for the impeller....

  9. Back To Top    #9

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    if I indeed buy the 1HP impeller, what are the effects of running it without a diffuser...it seems no one in the world has the diffuser...

    this is what the interior looked like when I opened the pump.


    I only noticed the issue after a rattling noise began a couple of weeks ago. You can see the washer like plastic piece...my guess its a piece of the impeller that broke. The pump primed fined and ran without issues before this but it seems the impeller has been broken down for a while now...



    does this black/grayish piece come out?

  10. Back To Top    #10
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: renlacing pump, which do I need?

    You have to have both the impeller and diffuser to work.
    I am not sure about the specific pieces in yours, although I would think the grey piece in the last picture should come out.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  11. Back To Top    #11

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    Quote Originally Posted by heyitsme06

    does this black/grayish piece come out?

    I believe this the diffuser, and seems like its not broken, what purpose does the diffuser serve?

  12. Back To Top    #12

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    jblizzle, here is a diagram of my pump, numbers 9 and 10 are the parts I need?


  13. Back To Top    #13
    Smykowski's Avatar
    Join Date
    Sep 2011
    Location
    Gurnee, IL (North Suburban Chi-town)
    Posts
    3,065

    Re: renlacing pump, which do I need?

    I'm pretty sure the diffuser just helps channel the water where it's supposed to go. In every parts diagram I've seen, it's a single molded plastic piece. From what I can tell, your issue is the impeller that fell apart, so you would only need to replace part 10 in the diagram. As said earlier, you can always put on a smaller impeller, but NEVER put on a bigger one.

    I don't know if its the age of the pump that's the issue, but the parts are much more expensive than newer pumps. I was seeing impellers for about double the usual price on several different sites.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

  14. Back To Top    #14
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,473

    Re: renlacing pump, which do I need?

    You should really keep your posts together so people have a history: pool-pump-rattling-noise-t71726.html

    The diffuser is primarily to help equalize the axial and radial loads on the motor shaft when the operating point is off of the Best Efficiency Point (BEP). Operating without the diffuser, could cause the seals and/or motor bears to fail prematurely. However, there are many pump lines, mostly smaller pumps, that do not use diffusers because the smaller pumps have less load and the volute is designed to work without the diffuser. So it is hard to say for sure if this would be a problem or not.

    However, it is also hard to say if the diffuser needs to be replaced from that picture. It needs to be removed from the pump housing to inspect all sides and look for broken pieces.
    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

  15. Back To Top    #15

    Join Date
    Mar 2010
    Location
    Dallas, TX
    Posts
    61

    Re: renlacing pump, which do I need?

    thanks for the replies, so a small update I was able to find the impeller and diffuser although the impeller is for a 1HP, so no big deal as long as the pump works correctly.

    the website I ordered from was pool parts unlimited.com and they have lots of parts including so older pumps like mine.

    will update once the parts come in, thanks again I am learning a lot just by browsing the boards.

Posting Permissions

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