PCV melted

Discussion in 'Irrigation' started by zliminator, Dec 29, 2007.

  1. zliminator

    zliminator LawnSite Member
    Posts: 82

    I had an extra Sta-Rite 1HP shallow well pump laying around and since the pump went out on my hot-tub, I decided to mount it outside the room with a new heater. After running it for almost 3 days - cooling down to around 95 and heating up to near 104 for several hours, the pipes melted. I think it might have been mostly from the heat of the motor and the wooden enclosure.

    PICT0669.jpg
     
  2. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    The water coming out of a pump is rather warm, but its usually not warm enough to melt it.

    However, if you had your pump deadheaded and not moving any water, then it will quickly boil it.

    We always ran galvanized directly out of the pump for about 1' and then went to a PVC rusco screen.
     
  3. BrandonV

    BrandonV LawnSite Platinum Member
    Posts: 4,260

    was the pump pushing enough water? we've had pumps melt pipe before when oh lets say a homeowner put time on a station that doesn't exsist... pump comes on starts pumping, water doesn't go anywhere pipe heats up and boom, no more threads at the pipe, just melts them. we now of course always use about 12" of galv coming out of the pump
     
  4. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,540

    Usualy with a system on a pump you will want to hook a jump wire from any unused zones to an existing zone to prevent that from happening. Especialy on systems with Raindial controllers as raindials reset to 10 min a zone all zones after a power outage.
     
  5. BrandonV

    BrandonV LawnSite Platinum Member
    Posts: 4,260

    most of our homeowners w/ pumps don't even know where the controller is, so it only been a problem on 1 property
     
  6. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Was CSR using the hot tub?:laugh:
     
  7. BrandonV

    BrandonV LawnSite Platinum Member
    Posts: 4,260

    don't know I called him yesterday to offer use of the flat screen for the fooseball game, but haven't heard from him... I'm afraid he might have been attacked by a cougar
     
  8. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Male or female?
     
  9. zliminator

    zliminator LawnSite Member
    Posts: 82

    Its a hot tub so there are no 'zones'. I'm going to try it again, this time I'm going to make sure the pump runs for a while after the heat shuts off. Also I'm going to either loose the box over the pump or use a fan. I'm also going to try letting it cool down after each time I get it up to around 105 F. BTW, in my title I misspelled PVC.

    Dan
     
  10. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    wait, your pumping hot water...

    Ever bothered to read what is written on the side of PVC pipe...use CPVC.
     

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