Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: 2 dead pumps in 9 years - Concern is now on the plumbing

  1. Back To Top    #1

    Join Date
    May 2011
    Location
    Monmouth NJ
    Posts
    8

    2 dead pumps in 9 years - Concern is now on the plumbing

    Hi all, this is my first post.

    I bought my home with pool in 2007. The pool is approximately 40,000g and a standard square with rounded corners shape with 2" piping. both a 60sqft DE filter and heater are inline after the pump. the pool has two skimmers and a bottom drain, with 4 returns. the equipment is sitting ~15ft away from the edge of the pool and level with the ground on two concrete slabs. there is mulch around the equipment, but covering the pump.

    I replaced the "dead on opening" Jandy that came with the pool in May 07 (~ 5 years old). Replaced with a Hayward Super pump 1.5hp, which died last weekend (3 years old) . I am adding a Pentair variable speed for a number of reasons.

    I received the pump last night and started to look through the material. The book notes that the following "Do not install 90° elbows directly into pump inlet or outlet. A valve, elbow or tee installed in the suction line
    should be no closer to the front of the pump than five (5) times the suction line pipe diameter (i.e., two (2)
    inch pipe requires a ten (10) inch straight run in front of the suction inlet of the pump). This will help the
    pump prime faster and last longer.

    My piping is 10" at best before i hit the intakes and the three way valve elbows the intakes to be inline with the pump intake, could this be a cause of the two pump failures?

    The pumps have been exposed to the NJ summers (rain) and potentially to the sprinkler system, could this have shortened the life?

    I can post some pics tonight if that might help. I am trying to make sure I dont have a design issue with the pool and blow a much more expensive pump.

    We have had other wierd issues, such as not being able to keep chlorine up each year when we open, due to low Cyranic acid. I have had to add each year to get from 25 up to 50. I have read, once in, it should not go down. I do have to add water when I open, but never more than maybe 5% of volume.

    Sorry for the long post. Appreciate any insight
    40,000 inground pool
    Intelliflo VF pump

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: 2 dead pumps in 9 years - Concern is now on the plumbing

    Pictures will help, but I doubt that the plumbing will shorten the life of your pump.

    The CYA loss problem is a dfferent issue and you cna read about it going away over the winter sometimes by searching the forum. It does happen but can't be predicted.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,489

    Re: 2 dead pumps in 9 years - Concern is now on the plumbing

    Quote Originally Posted by jbuckley21
    The pumps have been exposed to the NJ summers (rain) and potentially to the sprinkler system, could this have shortened the life?
    Yes.

    But how do the pumps fail? When you say dead, do the pumps make any noise prior to failing or do they simply stop working? Have you tried to turn the motor shaft of the 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

  4. Back To Top    #4

    Join Date
    May 2011
    Location
    Monmouth NJ
    Posts
    8

    Re: 2 dead pumps in 9 years - Concern is now on the plumbing

    The Heads up on the CYA link was huge, thank you! I expierience huge CYA loss and FC burn each year to open. Now I have a huge concern regarding the cause and what i can do to combat during the winter. Also my pump is down and the pool is out of chlorine and we have 80+ weather her in NJ the next few days, so this just lit a fire under my @$$ to try and get the new pump in asap.


    The first pump (Jandy ~2002-2007) would not turn on, I did not check motor (due to inexpierence of all things pool) however our pool guy, who is fairly reliable, suggested replacing entirely.

    The Hayward super pump, was failrly loud at the outset. Appeared to vibrate quite a bit. The pumps have never been anchored to the concrete slab, however we did put rubber matting underneath the Hayward to combat vibration (I wonder now I that would have been a large contributor?). It increasing got louder, and this year when we started in, we had the pool guy listen over the phone and he said the bearings were shot. I continued to run until I could order a new pump, but it finally (siezed) as it will no longer turn on. I will do a post mortem on it to better understand what happened.

    Could exposrure to the elements cause the bearings to go so quickly? is it possible it was just a lemon?
    40,000 inground pool
    Intelliflo VF pump

  5. Back To Top    #5
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,489

    Re: 2 dead pumps in 9 years - Concern is now on the plumbing

    The environment can have an effect on pump life but there are plenty of pool owners in NJ that don't have the same issues either. The vibration though could certainly have an effect on the pump. First, if properly balanced, the pump shouldn't vibrate much but if the pump isn't bolted down and allowed to vibrate excessively, then the vibration could most certainly shorten the life of the bearings. Currently, my pumps are not bolted down but they don't vibrate all that much either.
    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

  6. Back To Top    #6
    Guest

    Re: 2 dead pumps in 9 years - Concern is now on the plumbing

    I just bought a cover for my new motor at the local Leslie's for $16. I think that exposure probably led to problems I had with the old pump, in addition to sitting outside wrapped in plastic for 2 years after the former owner moved (which the manual specifically says NOT to do). Mine sits close to the garden sprinkler as well as too close to the filter drain so hopefully this will help prolong its life.

    I purchased the exact same pump I had as it was the easiest thing to do (requiring no mods) plus I found a really good deal on it.

    I also have to add a lot of CYA every year, and it does make the intial shocking a little more difficult for the 1st week until the CYA dissolves. This year has been a particularly hard year to get started as I had to replace the pump and had other electric issues as well as filtering problems after wind storms. Hopefully those problems are all behind us now, but I was looking at the amount of pollen on a glass table and realized how hard that filter has to work to keep the pool clean.

Posting Permissions

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