Goodman b1789888 Flow Check Piston Kit 0.088 in Orifice

Product Description

The GOODMAN b1789888 is a flow check piston kit designed to regulate refrigerant flow in split-system heat pump and air conditioning applications. The kit includes a 0.088-inch orifice piston that functions as a fixed metering device, controlling refrigerant flow direction and rate between the indoor and outdoor coils. This type of piston replaces or supplements a check valve and piston assembly in systems that use a piston-style metering device rather than a TXV. Installation is typically performed by licensed HVAC technicians during system conversion, maintenance, or refrigerant circuit servicing.

This flow check piston kit is suited for residential and light commercial HVAC systems that use a fixed-orifice metering system. The 0.088-inch orifice size is matched to specific system capacity and refrigerant requirements. It is used in both cooling-only and heat pump configurations where the piston assembly sits in a check valve body to meter refrigerant flow in the appropriate direction depending on operating mode.

Key Features

• 0.088-inch orifice diameter for fixed-rate refrigerant metering
• Designed for use in piston-type check valve metering assemblies
• Compact form factor: 0.5 inches height, 15/32 inches width
• Lightweight at 0.017 pounds for easy handling during service
• Manufactured in the United States
• OEM-style replacement kit for piston-metered split systems

Compatibility

Designed as an OEM-style replacement piston kit for residential and light commercial split-system heat pumps and air conditioners that use a fixed-orifice piston metering device.

Installation Notes

Installation should be performed by a licensed HVAC technician following applicable local codes and EPA Section 608 refrigerant handling regulations. Recover all system refrigerant and confirm system pressure is at zero before opening the refrigerant circuit. Verify the orifice size matches the system charging requirements before installing the piston. Reassemble the check valve body to manufacturer specifications and leak-check all connections before recharging the system.

Technical Specifications

• Orifice Diameter: 0.088 inches
• Unit Height: 0.5 inches
• Unit Width: 15/32 inches
• Unit Weight: 0.017 pounds
• Country of Origin: United States
• Product Class: Conversion Kits and Orifices
• Vendor Part Number: 119F3197

Standard Information

• Brand: GOODMAN
• Manufacturer Part Number: b1789888