Dwyer Instruments tl25-v30-4l Compound Vacuum Pressure Gauge

Product Description

The DWYER INSTRUMENTS tl25-v30-4l is a utility-grade compound vacuum and pressure gauge designed to measure both vacuum and positive pressure in a single instrument. It covers a range of 30 inches of mercury vacuum through zero to 30 psi, displayed on a 2.5-inch dial face. The 0.25-inch lower-mount connection allows direct inline installation on pipes and fittings. Plumbers, HVAC technicians, and mechanical contractors use this type of gauge for system diagnostics, pressure testing, and monitoring low-pressure fluid or gas circuits.

This compound gauge is suited for residential and light commercial applications where both vacuum and positive pressure readings are needed on the same circuit. Typical install scenarios include HVAC refrigerant line monitoring, plumbing pressure testing, vacuum pump discharge lines, and general utility piping systems. The lower-mount configuration positions the dial face upright for easy reading when the gauge is installed on a vertical run or manifold.

Key Features

• Dual-range compound scale: 30 InHg vacuum to 30 psi positive pressure
• 2.5-inch dial face for clear at-a-glance readings in field conditions
• 0.25-inch lower-mount (bottom) connection for direct pipe or fitting installation
• Utility construction suited for general-purpose pressure and vacuum monitoring
• Single-instrument solution eliminates the need for separate vacuum and pressure gauges

Compatibility

Designed as an OEM-style replacement or field-service gauge for utility compound vacuum and pressure monitoring applications using a 0.25-inch lower-mount connection.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified mechanical contractors. Shut off system pressure and relieve all residual pressure or vacuum before removing or installing the gauge. Apply thread sealant or PTFE tape to the male threads per local mechanical code requirements. Do not overtighten the connection; hand-tighten plus a controlled quarter-turn with a wrench is typical practice to avoid damaging the gauge body or fitting.

Technical Specifications

• Gauge Type: Compound Vacuum and Pressure
• Pressure Range: 30 InHg vacuum to 30 psi
• Dial Size: 2.5 inches
• Connection Size: 0.25 inches
• Connection Location: Lower Mount

Standard Information

• Brand: DWYER INSTRUMENTS
• Manufacturer Part Number: tl25-v30-4l