utilizing a genuine ECR International part ensures exact dimensional compatibility with the cleanout cover assembly

providing the mechanical reliability required for high-demand residential and commercial heating applications

For techs performing a field conversion or replacing a clogged gas jet

Operating on a 24V AC coil

Advanced Distributor Products 176799953 Piston 321142-301 utilizing a genuine ECR InternationalThe ADP 176799953 is a precision engineered #53 ton piston designed for reliable refrigerant metering in residential HVAC systems. Also known as a fixed orifice metering device, this genuine ADP replacement part is critical for maintaining the correct pressure drop between the high and low sides of the cooling circuit. Specifically sized for 1. 5 ton R22 or 2 ton R410A evaporator coils, it ensures the optimal flow of refrigerant to maximize heat