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The Watts N55B-M1 is a water pressure reducing valve designed to regulate incoming water pressure and protect plumbing systems from excessive pressure levels. Manufactured by Watts Water Technologies, this valve was commonly installed in residential and commercial plumbing systems to maintain a stable downstream pressure and help protect pipes, appliances, and fixtures from damage caused by high supply pressure.
The model has since been discontinued and replaced by the updated LFN55B-M1 lead-free version.
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