Weiss Instruments tl40-030-4l Pressure Gauge 0-30 Psi 4 in

Product Description

The WEISS INSTRUMENTS tl40-030-4l is a 4-inch dial Trade Line pressure gauge rated from 0 to 30 psi with a dual-scale readout in both psi and kPa. It connects via a 1/4 NPT lower port and is built around an all-brass movement with a precision gear and pinion mechanism for reliable, repeatable readings. The case is drawn steel with a black finish. Accuracy meets ASME B40.100 Grade B at plus or minus 3-2-3 percent across the dial. Licensed HVAC technicians, plumbers, and mechanical contractors install this type of gauge in low-pressure systems where a clear, accurate reading is required at a glance.

This gauge is suited for residential and light commercial applications where monitoring low-pressure gas, water, or fluid systems is required. The 4-inch dial face provides easy readout from a distance, making it practical for equipment rooms, boiler panels, and similar mechanical installations. The lower 1/4 NPT connection is a standard configuration for direct panel or pipe mounting. Operating temperature range of -40 to 140 degrees F makes it compatible with a wide range of indoor and outdoor mechanical system environments.

Key Features

• 0-30 psi range with dual-scale psi and kPa dial for versatile readout
• ASME B40.100 Grade B accuracy at plus or minus 3-2-3 percent
• 4-inch white coated metal lithographed dial with black and red graduations
• All-brass movement with precision gear and pinion construction
• 1/4 NPT lower connection with brass socket and soft soldered joint
• Drawn steel case with black finish and polycarbonate push-in window
• Bronze Bourdon tube with push-in restrictor for pulsation protection

Compatibility

Designed as an OEM-style replacement or new-installation pressure gauge for residential and commercial low-pressure mechanical systems requiring a 4-inch dial and 1/4 NPT lower connection.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or mechanical contractor. Shut off system pressure and relieve any residual pressure in the line before removing an existing gauge or threading in a new one. Apply thread sealant appropriate for the system fluid to the NPT threads before installation. Do not over-tighten the connection, as brass fittings can be damaged by excessive torque.

Technical Specifications

• Pressure Range: 0-30 psi
• Dial Size: 4 inches
• Scale: Dual scale psi and kPa
• Accuracy: plus or minus 3-2-3 percent, ASME B40.100 Grade B
• Connection: 1/4 NPT, Lower
• Process Temperature Range: -40 to 140 degrees F (-40 to 60 degrees C)
• Ambient Temperature Range: -40 to 140 degrees F (-40 to 60 degrees C)
• Case Material: Drawn steel, black finish
• Window Material: Polycarbonate, push-in
• Bourdon Tube Material: Bronze
• Socket Material: Brass, soft soldered connection
• Movement: All-brass precision gear and pinion
• Pointer: Balanced aluminum with black finish
• Restrictor: Push-in type

Standard Information

• Brand: WEISS INSTRUMENTS
• Manufacturer Part Number: tl40-030-4l