Parker Valve Core Tools

Overview

The PARKER AVUS3BH-4 is a bulkhead solder union access valve designed for refrigeration systems requiring a secure, leak-free service port through a panel or bulkhead wall. Rated to 500 psi maximum working pressure, this valve accepts 1/4-inch tube OD connections and is constructed from brass for reliable corrosion resistance in refrigerant service environments. The bulkhead union design allows the valve to be installed through a partition while maintaining a soldered connection on both sides, giving HVAC-R technicians a clean, permanent access point for system charging, recovery, and pressure testing. This access valve is suited for commercial and residential refrigeration equipment where a fixed, through-panel service port is required. Typical applications include reach-in coolers, refrigerated display cases, condensing unit enclosures, and other sealed refrigerant circuit assemblies where technicians need repeatable, tool-accessible service ports without compromising the enclosure. It is installed by qualified HVAC-R technicians during system assembly or as a retrofit service fitting. Key Features 500 psi maximum working pressure rated for refrigerant service Bulkhead solder union design enables through-panel mounting with soldered connections on both sides 1/4-inch tube OD connection size for standard refrigeration tubing Brass construction resists corrosion in refrigerant and moisture-exposed environments Compact, single-piece design suitable for tight enclosure…