Description
The Weil McLain 511-624-302 is an OEM replacement pressure switch engineered for precise draft and combustion air proving in Weil McLain boiler systems. Featuring a 1.40″ water column (wc) set point, this switch monitors system pressure and opens or closes its SPST (Single-Pole, Single-Throw) circuit at the calibrated threshold — helping protect the heat exchanger and ensuring safe burner operation.
The dual 1/4″ barb port design allows straightforward connection to the pressure tubing on both the positive and negative sides of the pressure sensing circuit, making installation clean and reliable. As a direct OEM replacement part, the 511-624-302 is built to Weil McLain’s exacting standards for dependable, long-term performance in residential and light-commercial hydronic heating applications.
Key Features
- OEM replacement pressure switch for compatible Weil McLain boiler models
- 1.40″ water column (wc) calibrated set point for accurate pressure sensing
- SPST (Single-Pole, Single-Throw) switching action
- Dual 1/4″ barb port connections for easy tubing attachment
- Monitors draft or combustion air pressure to ensure safe burner operation
- Direct drop-in replacement — no modifications required
- Built to OEM specifications for reliable, long-lasting performance
Application
- Compatible with select Weil McLain residential and light-commercial boilers
- Designed for use in hydronic heating systems requiring draft proving
- Ideal for service technicians performing pressure switch diagnostics and replacement
Specifications
- SKU / Part Number: 511-624-302
- Brand: Weil McLain
- Set Point: 1.40″ wc
- Switch Type: SPST (Single-Pole, Single-Throw)
- Port Connection: Dual 1/4″ barb
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