Weil McLain 510-218-099 Gauge

The Weil McLain 510-218-099 is a high-precision, dual-purpose combination pressure-temperature gauge designed for immediate integration into hydronic heating systems. Engineered for reliability in standard residential and light commercial boiler applications, this OEM replacement gauge features a 2.5-inch high-visibility dial with a dual-scale interface, providing simultaneous readouts for system pressure and water temperature. The analog display supports boiler pressure monitoring from 0–60 PSI and temperature tracking across a range of 60°F to 320°F (or 250°F depending on specific system limits), ensuring your equipment operates within calibrated safety parameters.

This T&P gauge utilizes a 1/4" NPT back connection for a secure, leak-proof fit into the boiler shell or tapping port. Specifically compatible with a wide array of Weil McLain boiler models, including the CG, GV, HE, and 88 series, it is a critical diagnostic component for maintaining system efficiency. Field technicians will appreciate the short-shank design, which facilitates installation in tight clearances where standard gauges may struggle to fit. By replacing a fouled or cracked original unit with this Weil McLain 510-218-099, you restore accurate real-time feedback essential for preventing over-pressurization and thermal stress on the heat exchanger.

• Dual-Function Monitoring: Provides integrated pressure and temperature readings to simplify boiler diagnostics and routine maintenance.
• OEM Compatibility: Exact replacement for Weil McLain boilers, ensuring accurate calibration and thread compatibility with 1/4" back-mount ports.
• Professional Grade Accuracy: Features 2.5-inch dial for precise viewing of PSI and Fahrenheit levels, vital for hydronic system balancing.
• Durable Construction: Built to withstand the constant thermal cycling and vibration of active hydronic heating systems.

• Which Weil McLain models are compatible with the 510-218-099 gauge? This gauge is widely used across the CG, GV, HE, HE II, VHE, and 88 series boilers, serving as a standard Weil McLain replacement part for most water trim configurations.
• Does this gauge require a separate temperature well? No, this is a direct-immersion combination pressure-temperature gauge that installs directly into a 1/4-inch NPT tapping to measure both metrics from a single point.
• What is the maximum pressure rating for this T&P gauge? The Weil McLain 510-218-099 is rated for a maximum system pressure of 60 PSI, making it ideal for standard low-pressure residential hot water boilers.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.