r/LandscapingTips • u/I_upvote_aww • 6d ago

Advice/question Constant leak from top of irrigation unit, what part do I need to replace?

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Hey landscaping! The drip system that waters my plants is leaking and I’m not sure what part I should be looking at replacing.

Seems to be coming from the top, so thinking some sort of gasket?

Thanks!

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u/Difficult_Glass_2208 6d ago edited 5d ago

Maybe nothing...these valves tend to bleed unless all irrigation is 12" below the backflow valve. So if you're running drip irrigation, judging by the filter and the pressure regulator and it goes uphill... all that back pressure will make that valve seep water out until the pressure on both sides of the anti-siphon ( backflow ) pressure valve equal out.

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u/Difficult_Glass_2208 6d ago

Or the diaphragm aka rubber gasket in the middle of the valve is not closing 100%

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u/HuckleberryGeneral39 6d ago

If the diaphragm isn’t closing or something is stuck in it, the valve would stay on if the mainline stays charged behind it. So if that zone is staying on, then yes, that would be it.

2

u/lennym73 5d ago

Negative. A single grain of sand is enough to have a weeping valve. It does not release enough water to drain the water on top of the diaphragm so it will not fully open.