Oct 18, 2020

How to Winterize a Sprinkler System


Unfortunately I live in the north and we need to winterize our sprinkler system so the valves, lines and sprinkler heads don’t freeze and crack. Many of my neighbors pay a service to have this done. It’s not a bad alternative especially if you hire a reliable established business. They often times guarantee their work, if there is a problem in the spring they’ll repair it if their winterizing was at fault.

I’ve been winterizing my system myself for years. It’s not hard but you will need a compressor and some quick disconnect air compressor fittings which you can get at any home improvement store.

Here are the steps I follow to Winterize my Sprinkler System:

  • If you haven’t already, install quick disconnects in you back flow valve for the compressor connection.
  • Turn off the water supply valve to your sprinkler system.
  • Set your sprinkler system controller to your first zone.
  • Turn on your air compressor to fill the tank with air.
  • Connect the quick disconnect on the compressor to the fitting on the sprinkler system check valve.
  • Turn the screw valve on the fitting to start compressed air flow into your first zone.
  • Water should spray from your sprinkler heads.
  • Repeat the process for each of the zones in your sprinkler system.

You may want to double check and make sure the main line shutoff valve actually shuts off. I have problems where a slow drip can fill the line on the outside of the house, freeze and crack the pipes.

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