Bushing, Spigot x FPT (Flush Style) PVC Schedule 80 3" x 2-1/2" (838-339)

The 3" x 2-1/2" PVC Schedule 80 Flush Bushing (Spigot x FPT) provides a compact, pressure-rated transition from a 3" Schedule 80 socket fitting down to a 2-1/2" female NPT threaded port. The spigot end inserts directly into the socket of an existing 3" Schedule 80 fitting, while the 2-1/2" FPT socket accepts any standard 2-1/2" male NPT fitting, valve, equipment connection, or threaded adapter — bridging a solvent-welded 3" system to a threaded 2-1/2" interface in a single flush-profile fitting body.

As the largest outlet size in the confirmed 838-33x sub-series, the 838-339 occupies a distinctive position within the group. A 2-1/2" FPT outlet off a 3" spigot is a near-equal reduction — a 2-1/2" pipe carries approximately 69% of the cross-sectional area of a 3" pipe — meaning this bushing is appropriate for applications where the threaded port must carry a large share of the main line's flow capacity, not merely serve an instrument, drain, or small branch function. At this size step, the bushing is less a flow-restricting reduction and more a connection-type transition: its primary function is converting a 3" solvent-weld socket to a 2-1/2" threaded interface while maintaining near-full flow capacity through the fitting.

This near-equal reduction profile makes the 838-339 particularly well-suited for equipment terminations, valve body connections, and pump port interfaces where a 3" solvent-welded supply line feeds a 2-1/2" threaded equipment inlet — a configuration common in commercial pump systems, industrial process installations, and filter station assemblies where equipment manufacturers specify 2-1/2" NPT threaded ports on bodies plumbed into 3" PVC systems. The flush bushing format keeps the assembly compact by seating directly into the host fitting socket, avoiding the protruding hex flats of a standard hex bushing and preserving clearance for adjacent fittings and wrench access in tight mechanical layouts.

Manufactured to ASTM D2464 standards and listed under NSF/ANSI 14, the 838-339 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 across industrial, chemical, and commercial service environments.

Specifications:

Industries & Applications:

• Pump Systems & Mechanical Rooms — The primary application at this near-equal size step; installed at 3" Schedule 80 fitting bodies on pump suction or discharge assemblies where a 3" solvent-welded run terminates at a 2-1/2" threaded pump port, valve inlet, or strainer body; the near-full flow capacity of the 2-1/2" FPT outlet ensures minimal hydraulic restriction at the equipment interface
• Chemical Processing — Used in 3" Schedule 80 solvent-welded chemical distribution and transfer headers where a 2-1/2" threaded equipment port, vessel connection, or secondary distribution line must interface with the main solvent-welded run in chemically aggressive service environments requiring both pressure integrity and broad chemical resistance
• Industrial Manufacturing — Applied in process piping systems where a 3" Schedule 80 solvent-welded main must transition to a 2-1/2" threaded connection at high-flow equipment inlets, filter housings, strainer bodies, and large-format inline component ports where near-full flow capacity through the threaded interface is a system requirement
• Municipal Water & Wastewater — Installed at 3" Schedule 80 fitting bodies in pump stations, treatment facilities, and distribution infrastructure where large-format 2-1/2" threaded equipment connections, valve bodies, or service branches must interface with solvent-welded Schedule 80 mains in congested piping layouts where the flush profile minimizes clearance conflicts
• Commercial Plumbing — Used in mechanical room Schedule 80 piping where a 3" solvent-welded service line transitions to a 2-1/2" threaded valve, backflow preventer, or equipment connection requiring near-full flow capacity at the threaded interface; the flush bushing profile keeps the assembly compact in mechanical rooms where fitting clearance is at a premium
• Irrigation & Agricultural — Applied at pump discharge assemblies, filter station inlets, and large-format valve manifold connections where a 3" Schedule 80 solvent-welded supply fitting must transition to a 2-1/2" threaded valve or equipment port in large-scale irrigation infrastructure serving commercial, agricultural, or municipal water management systems
• Water Treatment & Filtration — Provides a near-full-flow 2-1/2" threaded equipment interface at 3" Schedule 80 fitting connections in multi-stage water treatment systems, filter vessel inlets, and UV system ports where minimal flow restriction at the solvent-weld to threaded transition is a design priority