438-532 6" x 4" Sp x Fpt Reducer Bushing PVC SCH 40

Technical Specifications

This 6” x 4” SP x FPT Reducer Bushing PVC SCH 40 reduces a 6" pipeline or fitting down to a 4" threaded connection for secure transitions in Schedule 40 PVC systems. The spigot end seats into any 6" socket using primer and solvent cement, while the 4" female pipe thread (FPT) accepts compatible threaded fittings, valves, or risers.

Constructed from durable white Schedule 40 PVC, this reducer bushing meets ASTM D1784 requirements and is NSF-listed for potable water use. It supports service temperatures up to 140°F and typical large-diameter Schedule 40 pressure ranges, noting that threaded ends reduce maximum PSI. It ships in cartons of five and pallets of 240 for industrial, commercial, and contractor supply needs.

Typical Applications

A 6x4 PVC bushing like this is common in large water-movement systems where high-volume lines transition to smaller threaded equipment connections. Contractors and plumbers use it in industrial water distribution, commercial irrigation zones, aquaculture and fishery water transfer, and pump and filtration systems that require a 4" threaded inlet or outlet.

Additionally, it supports wastewater transfer within standard chemical-compatibility limits and is frequently seen in commercial pools, spas, water features, and OEM assemblies where equipment interfaces demand a 6" to 4" reduction.

Installation & Handling Tips

To start, set the 6" spigot end into the matching socket using PVC primer and solvent cement, making sure the fitting is fully seated and supported during curing; larger pipe fittings can shift if they’re not braced correctly.

For the threaded 4" end, wrap male threads with PTFE tape or use a PVC-safe thread sealant. Hand-tighten, then add only a quarter to half turn with a strap wrench; overtightening can create stress cracks in large Schedule 40 components. Let the solvent-cement joints cure fully before pressurizing the system, and be sure to support adjoining pipe runs to prevent unnecessary strain on the reducer bushing.

Why Choose Maxx Supply?
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Maxx Supply provides contractors, facility teams, professional plumbers, and DIYers with consistent access to high-demand Schedule 40 PVC fittings at competitive pricing. Our inventory levels support bulk orders and repeat purchasing for long-term projects.

Every fitting comes from trusted manufacturers that meet ASTM standards, and our customers can count on expert guidance for sizing, compatibility, and installation questions. Fast fulfillment and a dependable supply chain make us a strong partner for OEMs, irrigation installers, and industrial facilities.