Bushing, Spigot x FPT (Flush Style) PVC Schedule 80 6" x 4" (838-532)

The 6" x 4" PVC Schedule 80 Flush Bushing (838-532) is a reducing bushing that transitions a 6" socket connection down to a 4" female-threaded port in a single, compact fitting — with a flush-style profile that seats cleanly inside the mating socket without protruding beyond the face. The spigot end inserts directly into any standard 6" Schedule 80 slip socket and is solvent-welded in place, while the 4" FPT port accepts any standard 4" male-threaded fitting, valve, adapter, or equipment connection.

The flush style profile is a meaningful distinction from hex head bushings — where a hex bushing projects outward from the socket face and relies on wrench flats for installation torque, the flush bushing sits recessed within the socket, producing a lower-profile assembly that is better suited to tight installation spaces, inline valve bodies, flanged equipment connections, and piping configurations where a protruding hex head would interfere with adjacent components or reduce clearance to unacceptable levels.

The combination of a solvent-welded spigot inlet and a threaded female outlet gives this bushing practical versatility at the transition point — the slip-to-thread configuration allows the downstream 4" connection to remain serviceable and removable without disturbing the solvent-welded upstream joint. This is particularly valuable in systems where valves, instruments, or equipment at the 4" port require periodic removal, replacement, or inspection without cutting into the primary 6" line.

Manufactured to Schedule 80 specifications and dimensionally compliant with ASTM D2467, the 838-532 delivers the elevated wall thickness and pressure rating that Schedule 80 gray PVC is specified for in chemical processing, industrial fluid handling, and demanding commercial applications. Gray PVC construction provides broad chemical compatibility with acids, alkalis, and industrial process fluids. NSF 61 certification confirms suitability for potable water contact where required.

Specifications:

Industries & Applications:

• Chemical Processing — size-reducing transitions at valves, pumps, and process equipment connections where a flush profile is required and the 4" port must remain serviceable without disturbing the upstream 6" solvent-welded joint
• Industrial Process Piping — inline reductions from 6" primary headers to 4" threaded valve, instrument, or equipment connections in plant utility and fluid handling systems
• Water & Wastewater Treatment — reducing transitions in treatment plant process piping where threaded equipment connections at 4" must integrate with solvent-welded 6" Schedule 80 headers
• Commercial & Industrial Plumbing — tight-clearance reducing connections in high-pressure mechanical systems where a hex bushing profile would create interference with adjacent piping or equipment
• Aquaculture & Food Processing — corrosion-resistant reducing transitions at equipment and valve connections in recirculating systems and chemical-exposure fluid handling installations
• Irrigation & Agriculture — 6" mainline-to-4" valve or equipment transitions in high-pressure chemical injection and large-scale irrigation distribution systems