Combination Pressure-Temperature Gauge for use with Boiler Sizes 85-125

Weil-McLain 510218097 – Combination Pressure and Temperature Gauge for EG Series Boilers

The Weil-McLain 510218097 is a direct replacement combination gauge for use in EG series water boilers. It provides simultaneous pressure (PSI) and temperature (°F) readings, enabling clear monitoring of system operating conditions. This OEM gauge is engineered for hydronic heating systems requiring accurate and consistent readout under varying load conditions.

The unit features a 2-1/2" diameter dial with back 1/4" NPT connection and extended shank length to accommodate standard mounting locations. It is constructed to deliver long-term performance in closed-loop systems where both pressure and temperature must be continuously monitored at the boiler manifold.

Product Features

• Dual Measurement Function: Displays system pressure (0–75 psig) and water temperature (60–320°F) on a single dial face
• OEM Specification: Factory-designed replacement for EG series residential water boilers
• Clear Analog Display: 2-1/2 inch dial with dual scale for quick field diagnostics
• Threaded Connection: 1/4" NPT back connection for standard boiler tap fittings
• Extended Shank: Long stem provides compatibility with recessed or hard-to-access port locations

Technical Specifications

• Model: 510218097
• Dial Size: 2-1/2 inches
• Pressure Range: 0–75 psig
• Temperature Range: 60°F to 320°F
• Connection: 1/4 inch NPT back mount
• Application: EG series water boilers (residential)

Installation Notes

This component is designed for direct installation into an existing 1/4" NPT tapping. Use appropriate thread sealant during assembly. For accuracy and safety, installation should be performed during system shutdown and pressure bleed-off. A qualified contractor should verify calibration following installation to ensure reliable system diagnostics.

Application Use

• Factory-specified for Weil-McLain EG water boilers
• Measures boiler outlet water pressure and temperature at a single point
• Supports system tuning, diagnostics, and safety verification

Summary

The Weil-McLain 510218097 combination gauge is a reliable, OEM-grade diagnostic instrument designed for compatibility with Weil-McLain EG boilers. Its dual-function measurement capability and durable mechanical construction make it a critical part for field maintenance, service replacements, or initial system installations requiring integrated pressure and temperature monitoring.