Goodman B1789886 .86 Flow Check Piston

Description

Goodman B1789886 .86 Flow Check Piston Overview

The Goodman B1789886 is an OEM .86 flow check piston designed for use in Goodman heat pump and split-system HVAC equipment. Flow check pistons play a critical role in refrigerant circuit management — they prevent unwanted gravity circulation (thermosiphoning) of refrigerant when the system is not actively running, helping to maintain system efficiency and protect compressor integrity.

Key Features

• OEM Goodman replacement part — ensures proper fit and performance
• .86 flow rating for precise refrigerant metering
• Designed to prevent thermosiphoning and gravity circulation of refrigerant
• Helps maintain system efficiency and protects compressor from liquid slugging
• Built to Goodman’s original equipment specifications for reliable, long-lasting service
• Compatible with select Goodman and Amana heat pump and split-system units

Application

Flow check pistons are installed in the refrigerant line of heat pump systems to allow refrigerant flow in one direction during operation while blocking reverse flow when the system is off. The .86 designation refers to the orifice size, which must match the system’s design requirements for proper metering and performance. Always verify compatibility with your specific Goodman model before installation.

Specifications

• SKU / Part Number: B1789886
• Brand: Goodman (Amana-Goodman)
• Flow Rating: .86
• Type: Flow Check Piston
• Application: Heat pump and split-system refrigerant circuits