Bushing, Spigot x Slip PVC Schedule 40 8" x 5" (437-583)

The 8" x 5" PVC Schedule 40 Bushing (Spigot x Slip) is a compact inline reducer designed to step down pipe size within an existing fitting connection — eliminating the need for a separate reducing coupling or additional fitting in the line. The 8-inch spigot end is a plain, male outer-diameter that inserts directly into any standard 8-inch slip socket fitting, while the 5-inch slip socket on the outlet end accepts 5-inch Schedule 40 PVC pipe for solvent cement installation. The result is a two-size reduction accomplished within a single fitting body, at the point of an existing connection rather than mid-run.

This is the defining advantage of a spigot-end bushing over a reducing coupling: the size transition happens inside the socket of a tee, elbow, coupling, or other fitting that is already part of the system layout. Where a reducing coupling requires its own straight run of pipe to occupy, a spigot bushing nests inside an existing fitting socket and performs the reduction without consuming additional linear space in the piping assembly. In congested mechanical rooms, compact manifold assemblies, and tight equipment connections, this difference is meaningful.

The spigot x slip configuration also distinguishes this bushing from a socket x slip (or hex bushing) style, where the large end is a female socket rather than a male spigot. Spigot bushings are specified when the bushing itself will be inserted into the socket of another fitting — a tee branch outlet, a coupling end, or an elbow socket — rather than accepting pipe on the large end. Understanding this distinction is essential when selecting the correct bushing style for a given application, as both styles are stocked and the two are not interchangeable at the installation point.

Manufactured to ASTM D2466 standards and compatible with Schedule 40 PVC pipe and fittings throughout its rated pressure and temperature range.

Specifications:

Industries & Applications:

• Irrigation & Agricultural Systems — Applied at manifold assemblies and mainline branch points where a compact inline reduction from an 8" fitting to a 5" downstream run is required without adding a separate reducer coupling to the assembly
• Industrial Process Piping — Used in process manifolds and equipment connections where a size reduction must occur within an existing fitting socket, conserving linear space in congested pipe rack or mechanical room layouts
• Municipal Water & Wastewater — Incorporated in pump station and treatment plant piping where inline size reductions at tee outlets, coupling ends, or elbow sockets are required as part of a larger manifold or header assembly
• Large Commercial Plumbing & Mechanical — Specified in mechanical room piping where a spigot bushing inserted into an existing 8" fitting socket provides a compact, code-compliant size transition without restructuring the fitting assembly
• Industrial Drainage & Discharge — Applied in large-bore drain headers where a branch or outlet connection must step down from an 8" fitting to a smaller downstream drain run in a single fitting body
• Water & Wastewater Treatment Facilities — Used at process piping branch points and equipment connection outlets where inline reduction within an existing fitting socket simplifies the assembly and reduces overall fitting count in the system