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The last 3 posts

Wednesday, May 23rd 2012, 8:21am

by GatorGuy

The sprinkler supply valve is a vacuum breaker type AND there is a
backflow preventer further down the line (why? I don't know).
Any info such as make/model?
Pictures would help.

You said it runs normally but for the tapping.
If you find a valve can you feel any pulsing in the valve?

Wednesday, May 23rd 2012, 7:42am

by Wet_Boots

a photo or two, and your location, will help you get a recommendation as to any backflow-preventer remedies you might need

Tuesday, May 22nd 2012, 9:58pm

by QuietJet

Constant rythmic tapping in water main only with sprinkler supply open.

Just started my system for the year. Operates normally. Noticed a constant tapping in my water main (only when sprinkler supply valve is open). Kinda driving me crazy, but I'd like to water my lawn. There is a pressure reducing valve on the main line to the house but the sprinkler main is tapped in prior to the regulator. The sprinkler supply valve is a vacuum breaker type AND there is a backflow preventer further down the line (why? I don't know). Ideas? Thanks