Reducer Bushing, Spigot x Slip PVC Schedule 40 6" x 5" (437-534)

The 437-534 is a PVC Schedule 40 reducer bushing with a 6" spigot (male plain end) inlet and a 5" slip (socket) outlet, designed to reduce a 6" socket fitting or pipe hub down to a 5" solvent-welded pipe connection within a single compact fitting. The 6" spigot inlet inserts directly into any standard 6" Schedule 40 socket fitting or pipe hub and is joined with solvent cement and primer per ASTM D2564, while the 5" slip outlet accepts a standard 5" PVC pipe end joined the same way — creating a fully solvent-welded, permanent, pressure-rated reducing transition with no threaded connections at either end.

Manufactured from rigid PVC compound conforming to ASTM D1784 cell classification requirements, this bushing delivers the corrosion resistance, chemical compatibility, and long service life associated with Schedule 40 PVC across a wide range of commercial, industrial, and municipal piping systems. The Schedule 40 wall thickness provides reliable pressure-rated performance for both pressurized distribution systems and gravity-flow applications, and the all-PVC construction resists corrosion, biological growth, and a broad range of chemical media throughout its service life.

The 437-534 performs the most modest reduction available in the 6" spigot x slip bushing series — a single one-inch step down from 6" to 5". This near-full-diameter transition is the defining characteristic of this SKU and governs its application context entirely. Unlike the more aggressive reductions of smaller-outlet siblings in the series, the 437-534 is not a flow-reducing fitting in any meaningful sense — at a 6" to 5" step-down, both pipe sizes carry very high flow volumes and the primary function of this bushing is dimensional matching rather than capacity reduction. The most common application is connecting a 6" socket fitting — a tee, coupling, valve, or manifold port — to an existing or specified 5" pipe run where the pipeline transitions between these two adjacent large-diameter sizes. This scenario arises frequently when tying into existing 5" infrastructure through a 6" fitting, adapting equipment with 6" socket ports to 5" distribution piping, or managing a pipeline size transition at a fitting rather than in the pipe run itself. The spigot x slip configuration produces two permanent solvent-welded joints, making this bushing appropriate for fixed installations where the reduction point will not require future disassembly.

Specifications:

Industries & Applications:

• Municipal Water & Wastewater — Near-full-diameter dimensional matching between 6" socket fittings and 5" pipe runs at pump stations, treatment facility distribution headers, and water main assemblies where the one-inch size transition must be managed at a fitting rather than in the pipeline
• Irrigation & Agriculture — Connecting 6" socket fittings and manifold ports to 5" mainline pipe runs in large-scale pressurized irrigation systems where a near-equal-diameter transition is required at a distribution fitting, valve, or header connection
• Industrial Process Piping — Single-fitting near-full-diameter transitions in chemical distribution, cooling water, and process fluid systems where a 6" socket fitting or equipment port must interface with an existing or specified 5" pipeline without intermediate fittings or flow restriction at the transition point
• Commercial Plumbing — Large-diameter distribution system tie-ins in mechanical rooms and commercial buildings where a 6" socket fitting must connect to a 5" supply main or distribution header as part of a planned or phased pipeline installation
• Fire Suppression — Connecting 6" riser fittings and system components to 5" branch mains or supply headers in large fire suppression systems where adjacent large-diameter pipe sizes must transition at a fitting connection
• Aquaculture & Water Treatment — Near-full-diameter transitions between 6" socket manifold connections and 5" supply or distribution pipe runs in large recirculating aquaculture and water treatment systems where maintaining high flow capacity through the transition is a design requirement