Watts Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type - 915527

Watts Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type - 915527

Marsoni

M251S

$79.71

Get it in 3 business days with 1 day shipping. Friday, May 29

Watts Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type - 915527Designed to help prevent the build up of excessive pressure in systems containing air, oil, or water, this WATTS calibrated adjustable relief valve allows you to set the valve to the desired relief pressure. Model has durable, stainless steel spring operation and is ideal for use in bypass thermal expansion relief.

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Great fit, and lot more more robust in build than the OEM filter it replaces. I've replaced the factory cabin air filters in at least 3 vehicles with these, when the time came to replace. Side note: This one went into a 2020 Lincoln Aviator and --consistent with my experience with previous Lincoln models -- the retaining tabs on the filter housing door snapped off when I was trying to remove it. Nothing to do with the K&N filter, but I just don't understand why Lincoln can't design a better housing door mechanism.

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Reviewed in the United States on September 16, 2025