Williams Comfort Products 8G04W Liquid Gauge 4 Inch Face

Product Description

The WILLIAMS COMFORT PRODUCTS 8G04W is a liquid gauge designed for monitoring fluid pressure in plumbing, HVAC, and hydronic heating applications. Featuring a 4-inch face diameter for easy readability and a 1/4-inch NPTF threaded connection, this gauge suits installations where accurate liquid pressure indication is required. The NPTF thread form provides a pressure-tight mechanical seal without relying solely on sealant. Licensed plumbers, HVAC technicians, and hydronic system installers use this gauge as a service or replacement component on boilers, water systems, and related fluid-handling equipment.

This gauge is suited for residential and light commercial systems where a standard 4-inch dial face and 1/4-inch NPTF port are called for. Typical install locations include boiler supply and return lines, pressure test ports, and fluid distribution manifolds. The 4-inch face diameter improves visibility in mechanical rooms and utility spaces where quick pressure checks are performed without removing an access panel.

Key Features

• 4-inch face diameter for clear, at-a-glance pressure readings
• 1/4-inch NPTF connection for a pressure-tight threaded seal
• Designed for liquid pressure monitoring in hydronic and plumbing systems
• Compact, single-unit form factor suitable for tight mechanical spaces

Compatibility

Designed as an OEM-style replacement or service gauge for residential and light commercial liquid pressure monitoring applications requiring a 4-inch face dial and 1/4-inch NPTF port connection.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Depressurize and isolate the system before removing the existing gauge or fitting the new one. Apply thread sealant or PTFE tape appropriate for the fluid and pressure rating of the system. Follow applicable local plumbing codes and IPC guidelines when installing pressure instrumentation on closed-loop or potable water systems.

Technical Specifications

• Face Diameter: 4 inches
• Connection Size: 1/4 inch NPTF
• Weight: 1.579 pounds
• Unit of Measure: Each
• UPC: 662459922588

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: 8G04W