Goodman b1789871 Flow Check Piston Kit 0.071 in Orifice

Product Description

The GOODMAN b1789871 is a flow check piston kit designed for use in refrigerant metering applications within split-system heat pumps and air conditioning systems. The kit includes a replacement piston with a 0.071-inch orifice, which controls refrigerant flow rate through the check piston assembly. This component is classified as an accessory or conversion part, allowing technicians to match orifice sizing to the specific system refrigerant and capacity requirements. HVAC service professionals install this kit when replacing a worn or incorrectly sized piston in an existing flow check assembly.

This piston kit is suited for residential and light commercial HVAC systems that use a flow check piston as the primary refrigerant metering device. Systems using this style of metering device require precise orifice sizing to maintain proper refrigerant distribution in both heating and cooling modes. When converting a system or replacing a failed piston, selecting the correct orifice diameter is critical to system efficiency and capacity. The 0.071-inch orifice size targets specific tonnage and refrigerant combinations as defined by the equipment manufacturer.

Key Features

• 0.071-inch orifice diameter for precise refrigerant metering
• Designed as a direct replacement piston for flow check assemblies
• Compact form factor: 0.5 inches tall and 15/32 inches wide
• Lightweight at 0.017 pounds for easy handling during service calls
• Manufactured to OEM specifications for consistent performance

Compatibility

Designed as an OEM-style replacement piston for flow check assemblies used in residential and light commercial split-system heat pumps and air conditioning equipment requiring a 0.071-inch orifice.

Installation Notes

Installation should be performed by a licensed HVAC technician. Recover all system refrigerant and depressurize the refrigerant circuit before opening the flow check assembly. Ensure the replacement piston orifice diameter matches the system manufacturer specifications for the installed refrigerant type and system capacity. Follow applicable EPA Section 608 regulations for refrigerant handling throughout the service procedure.

Technical Specifications

• Orifice Diameter: 0.071 inches
• Unit Height: 0.5 inches
• Unit Width: 15/32 inches
• Weight: 0.017 pounds
• Product Class: Conversion Kits and Orifices
• Country of Origin: United States
• Vendor: Danfoss LLC
• Vendor Part Number: 119F3183

Standard Information

• Brand: GOODMAN
• Manufacturer Part Number: b1789871