Pentair 1/4" MPT Pressure Gage with Indicator

The Pentair 1/4" MPT Pressure Gauge with Indicator (part number 190058 or 190058Z) is a specialized diagnostic instrument engineered for monitoring the internal operational pressure of various pool and spa filtration systems, including the Pentair Clean & Clear, FNS Plus, Quad D.E., and Sand Dollar series. Enclosed in a heavy-duty, UV-stabilized ABS plastic case with a clear, high-impact lens, this analog gauge features a 1/4-inch Male Pipe Thread (MPT) brass connection stem extending from the bottom, which screws tightly into the manual air relief valve assembly at the peak of the filter tank dome. Its primary operational role is to display real-time hydraulic pressure readings up to 60 PSI, utilizing an adjustable plastic red bezel indicator that pool owners can manually set at the system's baseline "clean" pressure to clearly signal when a 10 PSI rise dictates a backwash or cartridge cleaning cycle. This vital monitoring component ensures the filtration capsule operates safely below its maximum limit of 50 PSI, preventing dangerous over-pressurization that could lead to structural damage or reduced flow efficiency. Built to withstand constant outdoor weathering, vibrating pump surges, and intense solar exposure without fogging or cracking, this compact instrument provides long-term readability. Due to its lightweight plastic housing and small internal brass Bourdon tube mechanism, this individual pressure gauge assembly carries a net product and shipping weight of approximately 0.15 to 0.20 pounds (about 2.4 to 3.2 ounces).