Built with a lead-free brass body

Always check secondary heat exchangers for soot buildup or obstructions

Durable Construction: Manufactured from high-grade materials to resist carbon buildup and corrosion in high-heat environments

This 243-8 series typically utilizes a 3/4" or 1" NPT vent depending on the specific diaphragm case

Maintains closed-loop control accuracy by eliminating mechanical slop in the linkage

Advanced Distributor Products 76712500 Control Box 322838-752 Built with a lead-free brassThe Advanced Distributor Products 76712500 Control Box is a high performance HVAC OEM replacement part engineered to serve as the primary management hub for residential and commercial heating systems. Designed specifically for compatibility with ADP unit heaters and modular air handlers, this industrial grade control board ensures seamless synchronization between system sensors and mechanical components. By utilizing authentic ADP replacement parts,