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The DWYER INSTRUMENTS tl25-030-4l is a utility water pressure gauge designed for monitoring water system pressure in residential and light commercial plumbing applications. With a 2.5 inch dial face and a range of 0 to 30 psi, it provides clear, direct-read pressure indication. The lower-mount configuration features a 0.25 inch male pipe thread (MPT) connection for straightforward installation into existing pipe fittings. This gauge suits licensed plumbers and HVAC technicians who need a reliable, easy-to-read pressure indicator on water supply lines, boilers, or closed-loop hydronic systems.
This pressure gauge is suited for utility water service in residential and light commercial settings. The lower-mount NPT entry point positions the dial face upright for easy visual monitoring when the gauge is installed on a vertical or horizontal pipe run. Common install scenarios include domestic water supply lines, pressure tank systems, boiler supply loops, and irrigation manifolds where a local pressure readout is required without additional instrumentation.
Designed as an OEM-style replacement or new-installation utility pressure gauge for residential and light commercial plumbing and hydronic systems with standard 0.25 inch NPT lower-mount porting.
Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local plumbing codes and IPC guidelines. Shut off the water supply and relieve system pressure completely before removing an existing gauge or threading in a new one. Apply thread sealant tape or compound to the male threads before installation to ensure a leak-free connection. Do not over-tighten the gauge body, as this can crack the fitting or distort the gauge housing.
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