Reducer Bushing, Spigot x Slip PVC Schedule 40 6" x 2" (437-528)

The 437-528 is a PVC Schedule 40 reducer bushing with a 6" spigot (male plain end) inlet and a 2" slip (socket) outlet, designed to reduce a 6" socket fitting or pipe hub down to a 2" 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 2" slip outlet accepts a standard 2" 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 437-528 performs a four-inch reduction within the 6" spigot x slip bushing series — stepping from a large-diameter 6" mainline socket down to a standard 2" service or distribution connection in a single fitting. This positions the 437-528 at the boundary between the high-flow primary branch reductions of the upper series (437-530 through 437-534) and the small-service outlet sizes at the lower end (437-524 through 437-526), with the 2" outlet occupying a practical middle ground: large enough to carry genuine secondary circuit flow for zone headers, pump connections, and branch distribution lines, yet representing a substantial enough reduction from the 6" inlet that the mainline capacity is clearly preserved at the junction. The 437-528 is closely related to the 437-529 (6" x 2-1/2") — the two SKUs serve overlapping applications and differ by a single half-inch in outlet size — making outlet diameter the primary selection criterion between them, driven by the downstream pipe size specified in the system design. The four-inch reduction in a single bushing eliminates the need for a reducing coupling or stacked intermediate fittings, keeping the transition compact in valve vaults, pump stations, and manifold assemblies where fitting count is a practical installation constraint. The spigot x slip configuration produces two permanent solvent-welded joints, making this bushing appropriate for fixed installations where the reduction will not require future disassembly.

Specifications:

Industries & Applications:

• Irrigation & Agriculture — Reducing 6" mainline socket fittings and distribution manifold ports to 2" secondary zone supply lines and lateral headers in large-scale pressurized irrigation systems where the branch serves a dedicated zone circuit requiring standard 2" pipe capacity
• Municipal Water & Wastewater — Reducing 6" socket connections to 2" secondary service branches at pump stations, treatment facility distribution headers, and water main assemblies where a controlled capacity step-down from a 6" trunk to a 2" service line is required
• Industrial Process Piping — Single-fitting four-inch diameter reductions in chemical distribution, cooling water, and process fluid systems where a 6" socket fitting or manifold port must transition to a 2" secondary distribution or service line without intermediate fittings in compact mechanical assemblies
• Commercial Plumbing — Large-diameter distribution system tie-ins in mechanical rooms where 6" supply headers must reduce to 2" service lines feeding individual equipment circuits, bypass assemblies, or secondary zone supply connections
• Fire Suppression — Reducing 6" riser fittings and cross-main socket connections to 2" branch supply lines, inspector test connections, and secondary distribution circuits in large fire suppression systems
• Aquaculture & Water Treatment — Reducing 6" socket manifold connections to 2" secondary supply and service lines in large recirculating aquaculture and water treatment systems where individual treatment circuits or tank supply lines operate at the 2" pipe size