Bushing, Spigot x Socket PVC Schedule 40 4" x 1" (437-417)

The 437-417 is a Schedule 40 PVC reducing bushing with a 4-inch spigot (plain end) and a 1-inch socket (slip) outlet. The spigot end solvent cements directly into any standard 4" Schedule 40 or Schedule 80 PVC socket fitting, while the socket outlet accepts the outside diameter of standard 1" Schedule 40 or Schedule 80 PVC pipe via solvent cement — producing a fully cemented, permanent transition from a large-diameter pipeline to a 1" solvent-welded branch, lateral feed, or secondary circuit without introducing a threaded joint at the reduction point.

The 1" outlet size sits at the practical midpoint of the 437 series 4" inlet sub-series — above the minimal-bore instrumentation and injection applications served by the 437-415 (1/2") and 437-416 (3/4"), and below the higher-flow secondary circuit and supply main applications associated with the 437-418 (1-1/4") and 437-419 (1-1/2"). This positions the 437-417 well for branch connections that must carry moderate flow — zone supply lines, equipment inlet feeds, bypass circuits, and secondary distribution branches where 1" cemented pipe is the specified downstream configuration and a fully bonded assembly is preferred over a threaded transition. Where a 1" female threaded outlet is needed at the same 4" inlet, the 438-417 (Spigot x FPT, 4" x 1") is the corresponding alternative.

For the 4" spigot end, use an IPS-grade, heavy-bodied solvent cement and a medium-bodied PVC primer per ASTM D2564 — for 4" and larger joints, a two-coat application is recommended to ensure full socket penetration and a reliable, leak-free bond. The 1" socket outlet follows standard primer-and-cement procedure for small-diameter PVC joints; ensure full pipe insertion to the socket stop and maintain joint alignment during the cure set period.

Specifications:

Industries & Applications:

• Municipal & Commercial Plumbing — Reduces a 4" cemented main line socket to a 1" solvent-cemented branch for moderate-flow zone supply lines, secondary service circuits, or equipment connections in commercial plumbing systems where a fully bonded all-cement transition is specified.
• Water Treatment & Distribution — Provides a cemented 1" branch connection on large-diameter PVC distribution and treatment system pipelines for secondary treatment feeds, sampling circuits, or flow diversion branches within fully solvent-welded assemblies.
• Irrigation & Agricultural Systems — Used at pump discharge headers, filter manifolds, and mainline distribution points where a 4" cemented inlet must reduce to a 1" cemented outlet for zone lateral feeds, pressure regulator supply lines, or moderate-flow secondary circuits.
• Industrial Process Piping — Adapts large-diameter PVC process lines to 1" cemented branch connections for secondary process circuits, moderate-flow bypass loops, or equipment inlet feeds in fully solvent-welded corrosion-resistant systems where threaded branch joints are not specified.
• Pool & Spa Plumbing — Transitions 4" suction or return headers to 1" cemented branch connections for auxiliary equipment feeds, secondary circulation circuits, or side-stream treatment supply lines in high-flow pool and spa installations.
• HVAC & Chilled Water Systems — Connects 4" PVC drainage or secondary piping to 1" cemented branch lines for moderate-flow drain circuits, secondary equipment connections, or condensate distribution branches on commercial mechanical systems.