How To Drain Your Backflow

1.  Turn the water off to your sprinkler system.  Usually in your basement or crawl space.

Shut off valve in the normal operating position (On).

Shut off valve in the normal operating position (On).

Shut off valve in the "Off" position.

Shut off valve in the “Off” position.

2. Go outside and turn all of the ball valves on your Backflow to a 45 degree angle as pictured below.  Make sure you do this to all 4 ball valves.  Two should have big handles like the blue handles below and two are the little flat head screwdriver slotted test cock valves that stick out of the side, sometimes they are in different locations depending on which brand of backflow you have.

From this.

Ball valves in operating position.

Ball valves in normal operating position.

To this.

Ball valves at a 45 degree angle for winterization.

Ball valves at a 45 degree angle for winterization.

3.  Open up your valve box/es and open the drain/s.  Valve boxes are in the ground and usually green.  Drain valves are usually located at the end of the line past the last zone valve.  Most of them have a cross shaped handle, but some of them are ball valves similar to the valves on your back flow and can be plastic.  By opening your drain valve/s in the valve box/es, the water will drain off of the front side of your backflow and copper pipe exposed to the air, and will drain your mainline that connects to your valves.  Pictured below, drain valve is on the right bottom of the picture (cross handle).

Valve box with 3 zone valves and one drain valve.

Valve box with 3 zone valves and one drain valve.

4.  Bring a large cup, bowl or bucket and go back to your basement or crawl space and open the drain to drain the back side of your backflow and pipe.  These drains are usually attached to the valve that you shut off the system with. Pictured below.  They are usually a little tiny cap that unscrews to let the water out.  But it is very important to do steps 1-3 before opening this drain cap or you willl not get all of the water out.   When done draining, leave this cap loose or unscrewed with a bucket underneath to catch any dripping if possible.

Drain cap on the right.

Drain cap on the right.

That’s it.

  • “Great experience, staff was always professional and the quality of care of the lawn was exceptional.”

    Kris D.
    Thornton, CO 80233
  • “Great service! Always prompt and effective communication. Would highly recommend!”

    Ryan K.
    Brighton, CO 80601
  • “I’ve had this excellent business look after my lawn, sprinklers and fertilizing for several years now and they hit the mark EVERY time. They are on time, dependable and most importantly to me, trustworthy. I’d give them 10 stars if Google allowed me to…”

    Shingo I.
    Thornton, CO 80241
  • “We love the wide variety of options they have for lawn care and their prompt service…. the staff are easy to work with and very knowledgeable. Les has helped us take our lawn from weed-filled and brown to healthy and green… I would recommend Happy Roots to anyone who needs lawn care service…”

    Anne H.
    Thornton, CO 80233
  • “Thanks to Happy Roots, we had one of the best looking yards on the block! I have used several other companies before, and none can compare to Happy Roots!…”

    Jennifer P.
    Broomfield, CO 80020
  • “Happy Roots has been doing my lawn mowing, fertilizing and snow removal for two years. They are always here when they say and do a really good job. They are quick and neat. They do very good work and are polite and helpful. I would recommend them to all.”

    Barbara B.
    Thornton, CO 80229
Get a quote ...
go
  • angieslist2015
  • angiessuperservice2014

  • 13ANG0007_SuperServiceLogo_Final_LessGradient-2200px

  • dave-ramsey

  • angies-list

  • ASSE

  • calp

  • landscapeinudstry

  • departmentofag

  • selectcertified

  • planet_pln