Bushing, PVC Schedule 40 8" x 2" (437-578)

The 8" x 2" PVC Schedule 40 Reducer Bushing (Spigot x Slip) is a large-differential inline reducer designed to transition from an 8-inch fitting connection point to a 2-inch downstream pipe run within a single compact fitting body. The 8-inch spigot end is a plain male outer-diameter that inserts directly into any standard 8-inch slip socket fitting, while the 2-inch slip socket on the outlet end accepts 2-inch Schedule 40 PVC pipe for permanent solvent cement installation. The result is a six-size step-down — from 8 inches to 2 inches — accomplished entirely within the socket of an existing fitting, without a separate reducer coupling, additional fittings, or extra pipe sections occupying space in the assembly.

The 8" x 2" configuration is the most pronounced size differential in the 437-series spigot bushing line described to date, and it reflects a specific category of application: systems where a large-diameter header, manifold, or distribution fitting must supply a small-bore downstream function — an instrumentation connection, a chemical injection port, a sample tap, a drain outlet, or a small-volume secondary supply line — directly from an existing 8-inch fitting socket. The 2-inch outlet serves a function that is intentionally subordinate to the primary 8-inch system, and the bushing provides that connection in the most compact, fitting-efficient way available.

The spigot-end configuration is what makes this possible. Rather than inserting a reducing coupling between two pipe sections — which would require cutting the run, adding joint count, and consuming linear space — the spigot bushing nests inside the socket of a tee branch outlet, coupling end, elbow socket, or other 8-inch fitting already in the assembly. The reduction occurs at the fitting socket itself, and the 2-inch slip outlet extends directly from there into the downstream run. In dense manifold assemblies, equipment connection clusters, and distribution headers where fitting footprint and joint count are both engineering considerations, this geometry has real practical value that a reducing coupling in open pipe cannot replicate.

As with all bushings in the 437-series, the spigot end is cemented into the receiving 8-inch fitting socket and the 2-inch slip socket accepts 2-inch Schedule 40 PVC pipe in the standard solvent cement installation procedure per ASTM D2235 guidelines. Manufactured to ASTM D2466 standards and compatible with Schedule 40 PVC pipe and fittings throughout the rated pressure and temperature range.

Specifications:

Industries & Applications:

• Instrumentation & Sampling Connections — The most characteristic application for a bushing of this size differential; the 2-inch outlet provides a dedicated instrumentation tap, sample port, or monitoring connection off an 8-inch header fitting — accomplishing the reduction directly in the fitting socket without a separate reducer or tee in the run
• Chemical Injection & Dosing Systems — Applied at 8-inch process header fittings where a 2-inch branch connection is required for a chemical dosing line, injection quill assembly, or secondary chemical feed that operates at a flow volume far below the capacity of the 8-inch main
• Irrigation & Agricultural Distribution — Incorporated at manifold branch outlets and mainline tee connections where an 8-inch distribution fitting must supply a 2-inch lateral to a small-zone valve, drip system submain, or individual irrigation circuit requiring only a fraction of the main header's capacity
• Industrial Process Piping & Manifolds — Specified in process plant distribution headers and manifold assemblies where an 8-inch fitting outlet must feed a 2-inch secondary process line, bypass circuit, or ancillary supply connection — using the bushing in the fitting socket to accomplish the reduction without adding a separate reducer to the open run
• Drain & Vent Connections on Large Headers — Used at designed drain or vent points on 8-inch process or water mains where a 2-inch drain outlet, air release connection, or low-point cleanout is required at an existing 8-inch fitting socket rather than as a separately installed branch assembly
• Water & Wastewater Treatment Facilities — Applied in treatment plant process piping where 8-inch header fittings must supply 2-inch branch connections to individual chemical dosing equipment, sample collection points, or monitoring instrumentation requiring only a small-bore supply from the primary distribution main