Bushing, MPT x FPT (Flush Style) PVC Schedule 80 4" x 2" (839-420)

The 4" x 2" PVC Schedule 80 Threaded Bushing (MPT x FPT, Flush Style) provides a compact, pressure-rated threaded reduction from a 4" male-threaded connection down to a 2" female-threaded port. The 4" MPT end threads directly into any standard 4" FPT fitting, valve, or equipment port, while the 2" FPT socket accepts a 2" MPT pipe or fitting — creating a clean, flush threaded reduction without the added profile of a hex bushing.

Unlike spigot x slip bushings that rely on solvent weld for permanent assembly, the all-threaded MPT x FPT configuration of the 839-420 allows for tool-assisted installation and, where appropriate thread sealant is used, can be disassembled for maintenance or system modifications. This makes threaded bushings particularly well-suited for equipment connections, valve bodies, tank fittings, and any location where future access or reconfiguration is a design consideration.

Manufactured to ASTM D2464 standards and listed under NSF/ANSI 14, this bushing is molded from dark gray Schedule 80 PVC compound — delivering the greater wall thickness, elevated pressure ratings, and broad chemical resistance that Schedule 80 specifications demand. The flush style keeps the installed profile low, making it a practical choice in tight-clearance installations where a hex bushing's protruding flats would create interference or complicate wrench access on adjacent fittings.

Specifications:

Industries & Applications:

• Chemical Processing — Threads into tank outlets, valve bodies, and chemical feed equipment ports where a 4" threaded connection must be reduced to a 2" process line; PVC's chemical resistance handles a broad range of acids, bases, and industrial fluids
• Industrial Manufacturing — Used at pump flanges, strainer housings, and process equipment connections requiring a flush-profile threaded reduction in high-pressure or chemically aggressive service environments
• Municipal Water & Wastewater — Applied at treatment equipment connections, meter vaults, and pump station piping where threaded Schedule 80 fittings are specified for pressure integrity and corrosion resistance
• Commercial Plumbing — Installed at large-diameter valve and equipment connections in mechanical rooms where a threaded reduction to 2" service lines is required
• Irrigation & Agricultural — Used at pump discharge headers, filter manifolds, and valve assemblies where large-diameter threaded supply connections transition to 2" distribution lines
• Aquaculture & Water Treatment — Threads into filtration vessels, UV housings, and tank bulkheads where a Schedule 80-rated, chemical-resistant reduction is needed at the equipment interface