Goodman b1789863 Flow Check Piston Kit 0.063 in Orifice

Product Description

The GOODMAN b1789863 is a flow check piston kit designed for use in refrigerant metering applications within split-system heat pumps and air conditioning equipment. The kit includes a 0.063-inch orifice piston that controls refrigerant flow direction and rate, functioning as a fixed metering device during the appropriate cycle. Sized for R-32 refrigerant service, this accessory is installed by licensed HVAC technicians during system commissioning, refrigerant conversion, or piston replacement service. Each kit is sold in a pack of two units.

This kit is appropriate for residential and light-commercial split systems that use a flow check piston assembly as the primary metering device. The 0.063-inch orifice sizing is specific to R-32 refrigerant circuit requirements. Technicians typically install this piston when converting a system to R-32 or replacing a worn or incorrect orifice piston to restore proper system performance. Confirm orifice sizing against the equipment data plate or engineering specification before installation.

Key Features

• 0.063-inch orifice diameter sized for R-32 refrigerant metering
• Sold as a pack of two pistons per kit
• OEM accessory classification for Goodman-compatible flow check assemblies
• Compact form factor: 0.5 inches in height, 15/32 inches in width
• Manufactured in the United States
• Supplied under Danfoss vendor part number 119F3177

Compatibility

Designed as an OEM-style replacement piston for Goodman split-system heat pump and air conditioning units equipped with flow check piston metering assemblies and specified for R-32 refrigerant service. Verify orifice size against the unit nameplate or manufacturer specification sheet before ordering.

Installation Notes

Installation must be performed by an EPA Section 608-certified HVAC technician. Recover all system refrigerant and relieve system pressure before opening any refrigerant circuit components. Confirm the correct orifice size for the specific system and refrigerant before inserting the piston. Follow all applicable local mechanical codes and manufacturer service instructions when reassembling the metering assembly.

Technical Specifications

• Orifice Diameter: 0.063 inches
• Refrigerant: R-32
• Unit Height: 0.5 inches
• Unit Width: 15/32 inches
• Unit Weight: 0.017 pounds
• Pack Quantity: 2
• Country of Origin: United States
• Vendor Part Number: 119F3177

Standard Information

• Brand: GOODMAN
• Manufacturer Part Number: b1789863