Firstco CP81-70 Orifice Piston 0.070 Inch Fixed Metering Device

The Firstco CP81-70 is a fixed orifice piston metering device designed for use in residential and light commercial HVAC air conditioning and heat pump systems. This piston features a 0.070 inch (70 thousandths of an inch) orifice diameter, precisely engineered to control refrigerant flow into the evaporator coil.

Key Features:

• 0.070 inch precision orifice diameter for accurate refrigerant metering
• Fixed orifice design provides consistent refrigerant flow
• Compatible with Firstco HVAC equipment
• Durable construction for reliable long-term performance
• Easy replacement design for quick field service

The fixed orifice metering device produces a steady refrigerant flow into the evaporator coil, creating the necessary pressure drop between the high-pressure liquid line and the low-pressure evaporator. Pistons are fixed orifice metering devices commonly used in residential heat pumps and straight cool systems. The correct orifice size is critical for proper system operation—an incorrectly sized piston can result in improper superheat, reduced cooling capacity, and potential compressor damage.

Fixed orifice metering devices can be easily replaced by unscrewing the cap, making field service straightforward for HVAC technicians. This replacement part ensures your Firstco system maintains proper refrigerant charge and optimal cooling performance.