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cbass

Can you guys ID this for me?

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It was right after the water meter.

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Backflow preventer, I think..... Just about all of the BP I have found are installed horizontal and not vertical. I can't say I have seen one like you have in the photo.

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Yes, it's a backflow preventer/check valve. It's not too common if this is a single family residence. I usually find them in commercial buildings, multi-family and LARGE homes, all with fire suppression sprinkler systems.

It has test cocks for annual testing, required by the manufacturer, if not local code. I don't see a relief port so vertical installation might not be an issue. There should be a strainer if there is no filter preceding it.

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