the BLW0889 is the verified OEM replacement for BLW1437

0001 and Wilbur Curtis WC-1803

this valve provides bi-directional dead-end service without the need for a downstream flange

ensure the actual size matches the cabinet rails before sliding the new cartridge into place to avoid air bypass

This prevents "single-phasing

McDonnell & Miller 750B-C-3 Control R-410A the BLW0889 is the verifiedThe McDonnell & Miller 750B C 3 is a robust cast iron liquid level control chamber designed as the modernized, high performance successor to the legacy 750 C 3 model. Engineered for demanding industrial and commercial HVAC systems, this remote mount sensor chamber (Part Number 176316) serves as a critical component in boiler water level management. Utilizing an electrode based conductance system, it is configured for use with 3 stainless steel probes