Description
The Weil McLain 511-624-402 is a precision-engineered pressure switch designed as a direct OEM replacement for Weil McLain boiler systems. Featuring a single-pole, single-throw (SPST) configuration and a factory-set trip point of 1.48″ water column (wc), this switch delivers reliable proof-of-pressure sensing to safeguard boiler operation and ensure proper combustion sequencing.
Key Features
- OEM Weil McLain replacement pressure switch — SKU 511-624-402
- Factory-set trip point: 1.48″ water column (wc)
- SPST (Single-Pole, Single-Throw) switching action
- Dual 1/4″ barb connections for easy hose attachment and secure pneumatic sensing
- Designed for integration into Weil McLain boiler control circuits
- Provides critical proof-of-pressure or proof-of-draft protection
Application
This pressure switch is a key safety component in Weil McLain heating systems. It monitors air pressure or gas pressure within the system and signals the control board to allow or interrupt burner operation based on the sensed pressure condition. The dual 1/4″ barb ports allow for straightforward connection to rubber or silicone sensing tubing, making installation and replacement fast and accurate.
Why Choose the Weil McLain 511-624-402
- Genuine OEM part ensures compatibility and reliable performance
- Precise 1.48″wc set point maintains proper system safety thresholds
- Dual barb design simplifies field installation and replacement
- Supports proper boiler sequencing and combustion safety
Specifications
- Brand: Weil McLain
- Part Number: 511-624-402
- Switch Type: SPST (Single-Pole, Single-Throw)
- Set Point: 1.48″ Water Column (wc)
- Connection Type: Dual 1/4″ Barb
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