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Here is the overall view of the valve access box: valve access box The valve is turned off because the pipe directly after the valve has come loose from the valve. I'd like to repair this, but I'm not sure what the grey/brown piece just below the valve is: grey/brown piece just below the valve Here are a few more shots of the side and the cap on the part that sticks down: Side cap

Matt
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3 Answers3

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That is a strainer wye. There is a metal mesh filter in there to trap sediment/debris; it can be removed and cleaned as necessary.

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Jimmy Fix-it
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It looks like a backflow preventer. Its purpose is to prevent the water in the irrigation system from being drawn into and contaminating your house hold water supply. If the water pressure to your home were to drop the pressurized water in the pipe could flow into your home.

mikes
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It's an old Zurn Wilkins backflow preventer. They're still in business.

TWS
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