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The DWYER INSTRUMENTS tl20-015-4l is a utility water pressure gauge designed for monitoring line pressure in plumbing and water systems. It features a 2-inch dial face with a 0-15 psi range, providing clear, readable pressure indication in residential and light commercial installations. The 1/4-inch male pipe thread (MPT) lower-mount connection allows for direct inline or tee installation on standard pipe fittings. This gauge is a field staple for plumbers and service technicians who need a reliable, low-cost pressure-monitoring solution without specialty tooling or complex setup.
This pressure gauge is suited for utility water service applications including domestic water supply lines, water heaters, pressure-reducing valve verification, irrigation systems, and general plumbing system diagnostics. The lower-mount entry orientation allows the gauge to sit upright when threaded into a vertical or horizontal pipe run, keeping the dial face visible and accessible during normal service checks. It is appropriate for residential plumbing, light commercial water systems, and any application requiring continuous or spot-check pressure indication up to 15 psi.
Designed as an OEM-style replacement or new-installation utility pressure gauge for residential and light commercial plumbing systems equipped with 1/4-inch MPT lower-mount gauge ports.
Installation is typically performed by a licensed plumber or qualified service technician. Shut off the water supply and relieve system pressure before removing any existing gauge or installing this unit. Apply thread sealant tape or pipe thread compound to the MPT threads before tightening — do not over-tighten, as gauge bodies can crack under excessive torque. Installations should conform to applicable local plumbing codes and IPC guidelines.
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