Description
The Weil McLain 511-624-303 is a factory-specified pressure switch engineered as a direct OEM replacement for compatible Weil McLain boiler systems. Designed to monitor and verify proper combustion airflow and venting conditions, this switch provides a critical safety interlock that helps protect the heat exchanger and ensures safe boiler operation.
Key Features
- Set point of 1.12″ water column (“wc) for precise pressure sensing
- SPST (Single-Pole, Single-Throw) switching action for straightforward circuit control
- Dual 1/4″ barb connections for easy hose attachment and secure pneumatic hookup
- OEM-quality construction built to Weil McLain specifications
- Serves as a safety interlock to prevent boiler operation under unsafe draft or pressure conditions
Application
This pressure switch is designed for use in Weil McLain boiler systems where combustion air pressure monitoring is required. It is typically installed in the venting or inducer circuit and opens or closes in response to the pressure differential created by the draft inducer blower. When pressure falls outside the acceptable range, the switch interrupts the control circuit, preventing unsafe operation.
Specifications
- Part Number: 511-624-303
- Brand: Weil McLain
- Switch Type: SPST
- Set Point: 1.12″ W.C.
- Connection Type: Dual 1/4″ barb
Why Choose OEM Replacement Parts?
Using genuine Weil McLain replacement components ensures compatibility, maintains system warranty integrity, and delivers the reliable performance your boiler was designed to provide. The 511-624-303 pressure switch is the correct fit for the application, eliminating guesswork and reducing callbacks.
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