Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Post winter close issues - main drain

  1. Back To Top    #1

    Join Date
    Apr 2014
    Location
    Ontario, Canada
    Posts
    49

    Unhappy Post winter close issues - main drain

    Hi All,
    I may have made a bad mistake when closing the pool for winter.
    I drained the return lines and the skimmer line ok but had troubles with the main drain. I was able to blow the water back (from the pump to the drain) a little ways, but no where near all the way then quickly closed it off. My (incorrect thinking) at the time was that the main drain line would have run far enough underground and that I "pushed" the water back enough that it would be below the frost. But, now I realize this probably isn't correct.

    Now that the thaw has started I'm worried that the line may have cracked or ruptured due to the freeze. Now I'm anxiously waiting for the thaw. My question is, if the main drain line does start to leak, is there a way to plug it (temporarily) without going in the pool (too **** cold right now)?

    Thanks
    Tim.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Post winter close issues - main drain

    Welcome to TFP!!!

    Did you put a plug in the floor drain? Did the pool freeze solid?

    If the answer to both of these is no, then I think the pool would have shown a leak by now ... unless the top is frozen and the bottom is empty (as one member found this year).
    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!

  3. Back To Top    #3

    Join Date
    Apr 2014
    Location
    Ontario, Canada
    Posts
    49

    Re: Post winter close issues - main drain

    Thanks for the welcome and the quick input!
    No plug in the floor drain.
    Nope, didn't freeze solid. (The drain is about 7 feet down). The top 1.5 feet froze......and if the bottom is empty...I think I'm divorced!
    Part of my concern is that the pump is about 3 to 4 feet below the surface level of the pool...so there is always pressure for the water to drain.

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Post winter close issues - main drain

    The odds are that you will be fine. It is nearly impossible to completely drain a main drain. The procedure you describe is essentially what we recommend, except that I would add anti-freeze before blowing it down as far as possible.
    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

Posting Permissions

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