Description
Weil McLain 511-624-452 Pressure Switch Overview
The Weil McLain 511-624-452 is an OEM replacement pressure switch engineered for use in Weil McLain boiler systems. Featuring a Single-Pole Double-Throw (SPDT) switching action and a factory-set trip point of 0.75″ water column (w.c.), this switch monitors combustion air pressure to verify proper draft inducer operation before allowing the burner to fire — a critical safety function in modern gas-fired boilers.
Key Features
- Factory-calibrated setpoint of 0.75″ w.c. for precise pressure sensing
- SPDT (Single-Pole Double-Throw) switching action for versatile circuit control
- Dual 1/4″ barb port connections for easy hose attachment to pressure taps
- OEM-grade construction for direct, drop-in replacement in compatible Weil McLain boiler models
- Helps ensure safe ignition sequencing by confirming adequate inducer draft before burner activation
Application
This pressure switch is designed as a direct OEM replacement for compatible Weil McLain gas-fired boilers. It is installed in the venting/combustion air circuit and works in conjunction with the draft inducer blower to confirm that proper negative pressure has been established prior to ignition. Replacing a failed or out-of-spec pressure switch with the correct OEM part helps restore safe, reliable boiler operation and avoids nuisance lockouts.
Specifications
- SKU / Part Number: 511-624-452
- Brand: Weil McLain
- Switch Type: Pressure Switch
- Switching Action: SPDT (Single-Pole Double-Throw)
- Setpoint: 0.75″ w.c.
- Port Connections: Dual 1/4″ barb
Why Choose OEM Replacement Parts?
Using genuine or OEM-equivalent Weil McLain replacement parts ensures compatibility with your boiler’s control board and safety circuit, maintains warranty compliance, and delivers the reliable performance your system was designed for. Always verify your boiler model number before ordering to confirm fitment.
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