Dual-Section Performance: Houses both 40 MFD (compressor) and 3 MFD (fan) circuits for streamlined wiring and replacement

The unit features direct flame current measurement ports

Check your original part for the "L165-20" or "626432" stamping to confirm

it is precision-formed for specific Weil-McLain models

Enhanced thermal contact prevents overshoot and protects expensive system components from thermal stress

Conbraco 37LF-201-01 Valve Dual-Section Performance: Houses both 40The Conbraco 37LF 201 01 is a lead free 1 2" vacuum relief valve engineered for heavy duty commercial and residential water heating systems. This model is the direct replacement for 37 201 01, providing a seamless retrofit into existing piping layouts. Designed to automatically admit air into the supply system, it effectively prevents vacuum conditions that can lead to tank collapse or siphoning. It features a high 15 CFM venting capacity and is rated