Weil McLain 510-218-100 Gauge

The Weil McLain 510-218-100 Gauge is a critical instrument for monitoring system conditions in low-pressure steam heating applications. This combination pressure-vacuum gauge features a large, easy-to-read 4 1/2-inch dial face, providing technicians with clear visibility for precise diagnostics on commercial and residential boiler systems. Engineered with a dual-scale range of 0-30 PSIG for positive pressure and 0-30" Hg for vacuum measurement, this gauge allows for comprehensive monitoring of steam trim performance and system cycles.

Designed for durability in demanding mechanical rooms, the unit includes a standard 1/4" NPT bottom connection for seamless integration into existing manifolds or siphons. As an authentic Weil McLain replacement part, this gauge is commonly utilized on commercial series boilers, including the 76, 78, 80, 88, and 94 models, as well as LGB and MGB series. Its robust construction ensures reliable tracking of pressure fluctuations, which is essential for maintaining safety limits and optimizing fuel efficiency across the hydronic heating system.

Key Benefits

• Dual-Scale Monitoring: Accurately tracks both 0-30 PSIG and 0-30" Hg vacuum to ensure the system is operating within design parameters.
• High Visibility: The 4.5-inch dial diameter is superior for industrial environments where smaller gauges are difficult to read from a distance.
• Standard Compatibility: The 1/4-inch NPT brass bottom connection fits most standard steam boiler trim configurations.
• OEM Reliability: Built specifically as a Weil McLain 510-218-100 component, ensuring exact fitment for commercial steam trim assemblies.

Common Questions

What boiler models is the 510-218-100 gauge compatible with?
This gauge is primarily used on larger Weil McLain commercial boilers, including the 88 and 94 series, as well as many legacy LGB and MGB units requiring vacuum and pressure monitoring.

Can this be used on a water boiler?
While technically possible to read pressure, this specific combination pressure-vacuum gauge is optimized for steam systems where monitoring the vacuum during the cooling cycle is necessary for proper air venting and operation.

Does this gauge require a siphon (pigtail)?
Yes, when used in steam applications, a siphon must be installed to protect the internal sensing element from high-temperature steam, ensuring the longevity of the boiler pressure gauge.

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.