How do I determine the water pressure of my automatic sprinkler?

I'm thinking of installing a new system because the current one doesn't reach my entire lawn. I'd like to know the current pressure so that I can purchase a system with stronger pressure.

asked by Marybeth (832)


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I believe there are 3 ways to do this, you can hook a pressure gauge to one of your outside faucets, hire a plumber that will already have a set-up to check water pressure, or quite possible contact your local water company and they will check it for you.

posted by phil9745 (158)

8 votes

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Go to the sprinkler head furthest from the supply and disconnect the sprinkler head and connect a water pressure gauge to the fitting. Activate the sprinkler system and the gauge will read the pressure.

posted by coronato (62)

5 votes

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To determine water presure you will need to install a "T" in the line with a quarter inch pipe thread opening. Also you will need to purchase a water presure guage and screw it into the tee. Turn it on and read the presure.

posted by RyHeab (53)

4 votes

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Most plumbing supply stores will sell a pressure gauge that you can hook up to an outside faucet. You attach it just like a garden hose and turn the water on. Once the valve is turned completly open; the dial will indicate the pressure that you currently have. This should give you the information you need.

posted by waterman (18)

4 votes

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The pressure of your sprinklers is determined by how many heads you have in the system. Another determining factor is how long of a run it is from the first head to the last head.

posted by f66 (37)

3 votes

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