How do I drain the supply line?

Discussion in 'Irrigation / Sprinkler Forum' started by rsmith99, Mar 18, 2017.

  1. rsmith99

    rsmith99 Member

    Feb 28, 2008
    My sprinkler system freezes every couple of years because the water does not drain from the supply line. The riser that comes out of the ground and goes into the back flow preventer always has water in it.

    How can I drain the line, at least below the ground?

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    You will need to add a lower shutoff and a way to drain that lower portion. I'm thinking a box to hold that in and to give access, and then foam over that in the Winter. For a drain I sometimes use a sillcock.

    I can see that the spin on ball valve has frozen and cracked.
  3. Sponsor

    Sponsor Paid Advertisement

Similar Threads: drain supply
Forum Title Date
Irrigation / Sprinkler Forum Winterization outside drain is not working Sep 26, 2017
Irrigation / Sprinkler Forum Use of Pvc Drainage Pipe Sep 2, 2016
Irrigation / Sprinkler Forum Need help with drainage in back yard Jun 21, 2011
Irrigation / Sprinkler Forum french drain help Aug 29, 2010
Irrigation / Sprinkler Forum Automatic line drains Jun 24, 2010

Share This Page