Weiss Instruments Manometers

Overview

The WEISS INSTRUMENTS lf251-015-4l is a liquid filled pressure gauge designed to monitor system pressure in plumbing, HVAC, and fluid handling applications. The liquid fill dampens needle vibration and protects internal components from pulsation and pressure spikes, extending service life in demanding environments. The gauge covers a range of 0 to 15 PSI and connects via a 1/4 inch lower connection or center back port, giving installers flexibility in mounting orientation. Licensed plumbers, HVAC technicians, and mechanical contractors typically specify this gauge for low-pressure system monitoring and service verification. This gauge suits residential and light commercial installations where low-pressure fluid or gas system monitoring is required. The 1/4 inch connection fits standard fittings commonly found on boilers, water supply lines, and HVAC hydronic systems. The liquid filled case makes it well suited for equipment subject to vibration or pulsation, such as pumps and compressors, where a dry gauge would lose accuracy or fail prematurely. Key Features Liquid filled case dampens vibration and protects against pressure pulsation 0 to 15 PSI range for low-pressure system monitoring 1/4 inch lower connection or center back connection for flexible mounting Dual connection option simplifies installation in tight or varied panel layouts Compatibility Designed as an OEM-style replacement or direct-install gauge for low-pressure plumbing, HVAC hydronic, and fluid handling…