Weil Mclain 511624521 Gas Boiler Air Pressure Switch

The Weil Mclain 511624521 Gas Boiler Air Pressure Switch delivers precise pressure sensing to ensure safe and efficient boiler operation. This high-altitude switch is designed for GV-brand gas boilers and supports elevations from 5,500 to 10,000 feet, helping your system maintain reliable combustion, proper venting, and dependable startup performance across challenging conditions.

In repair or new installation, this switch plays a critical role in flame safeguard and system safety by monitoring air pressure and triggering appropriate shutdown if pressure deviates from the 1.25 Inch WC setpoint.

• Pressure rating: 1.25 Inch WC
• Type: High Altitude
• Application: Used on Gas Boiler
• Compatibility: Used on Model/Brand GV
• Elevation range: 5,500 to 10,000 feet

Designed for easy replacement and long-term reliability, this air pressure switch helps maintain consistent burner operation and prevents unsafe venting conditions in both residential and commercial boiler setups.