Winterizing question

Discussion in 'Irrigation / Sprinkler Forum' started by martin1b, May 23, 2007.

  1. martin1b

    martin1b New Member

    Messages:
    19
    I'm installing a sprinkler system and have a question. I'm running my main trunk to the valve boxes from a pitless adapter from my well casing. From the pitless, I go to a shut off valve > sediment filter > then up through the frost line and into the trunk which is 18" below ground (above our freeze line). I was hoping to put a valve box above the shut off valve and sediment filter and let it hollow so I can access it when winterizing. However, even though it's below freeze line, since the pipes are exposed (some partially and some fully), wouldn't that create a freezing issue, even though they're below the freeze line?

    Bill
    Wichita, KS
  2. Verdeboy

    Verdeboy In the Trades

    Messages:
    2,051
    Winterizing

    It's only a freezing issue if there's water left in there. Can you drain it or blow it out?

    I think that if pipes are exposed to below-freezing air temp. it doesn't matter if they are below the frost line. They will freeze, but insulation can help.
  3. martin1b

    martin1b New Member

    Messages:
    19
    Thanks for the info. I'm also little worried about my tee off of the casing. One side has a shut off which everything after that will be blown out. On the other side, it feeds the house. It will remain pressurized. All of this is below freeze line. I plan to cover this with a valve box and put insulation in the hole. However, the hole will be open for accessibility.

    Is this a concern or am I making a mountain out of a mole hill?
  4. Verdeboy

    Verdeboy In the Trades

    Messages:
    2,051
    Insulation

    If it's properly insulated, you should be fine. On super cold days, you can keep the water dripping in one of your indoor faucets just to make sure.
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