10 Steps To Winterize Your Sprinkler System
1. If unfamiliar with blow out process contact a professional for assistance.
2. Divide the total gpm of each zone by 7.5. That’ll give you the cubic feet per minute (cfm) you need to blow it out.
3. Rent or buy a 10-cfm compressor and hose.
4. Set the compressor air pressure regulator to a maximum of 80 psi for rigid PVC pipe systems, or 50 psi for flexible black polyethylene pipe.
5. Turn off the water supply and set the system timer to open just one zone. Next, open the manual drain valve at the end of that zone (if equipped).
6. Connect the air line to the blow-out port.
7. Connect the other end of the air hose to the compressor and blow out the line. The heads should pop up and spit out water.
8. Disconnect the hose as soon as they run dry. Don’t overdo the blowout, without water cooling the plastic gears can melt in less than a minute. So move on to the next zone and allow the heads to cool.
9. Go back and blow out each zone a second time.
10. Sit back and relax knowing you won’t have to worry about your sprinkles until Spring.