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New Member


Saturday, July 14th 2012, 3:39pm

Minimum GPM?

I recently did a GPM test (bucket test) and only got 9.7 GPM seem low? This is from a well and a new pump, I filled the bucket with a water hose coming from the pump (if it matters). PSI was 45-50.


Supreme Member

Posts: 5,307

Location: Metro NYC


Saturday, July 14th 2012, 4:07pm

a proper bucket test involves a pump that isn't cycling - make sure yours isn't cycling


Supreme Member

Posts: 309

Location: Northern New Jersey


Saturday, July 14th 2012, 4:35pm

If they end up being solid numbers - I wish I had them.


New Member


Sunday, July 15th 2012, 1:39am

I do not have a presure switch ;( ..pump start relayed.

This post has been edited 2 times, last edit by "jedisme" (Jul 15th 2012, 2:13am)


Monday, July 16th 2012, 8:29am

It's a bit low but not unusual.
Seen a lot of systems designed for 10 gpm.
Be careful with the design and you should be ok.


New Member


Tuesday, July 17th 2012, 1:51am

I redid the bucket test after finding a fitting I did not snug up very well and instead of using a waterhose I went straight from the spigot. I got better numbers 13.6 GPM. :).


Tuesday, July 17th 2012, 8:10am

Glad to hear it.
Sure will make your design easier.


New Member


Saturday, January 12th 2013, 7:11pm

When I did my GPM bucket test at the spigot I got 8 GPM. Rainbird told me it was to low. So I re-tested it in the basment right at the poly pipe off the meter, and I got 30 gpm. The spigot was reduced down to 1/2" where the main line was 1" and there were no elbows or valves to slow it down.
I think it would be important to test it right where you would connect the sprinkler main. I would test it closer to the pump and use the biggest line you have (no reducers)

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