Bushing, Spigot x FPT (Flush Style) PVC Schedule 80 2-1/2" x 1" (838-289)

The 2-1/2" x 1" PVC Schedule 80 Flush Bushing (Spigot x FPT) provides a compact, pressure-rated transition from a 2-1/2" Schedule 80 socket fitting down to a 1" female NPT threaded port. The spigot end inserts directly into the socket of an existing 2-1/2" Schedule 80 fitting, while the 1" FPT socket accepts any standard 1" male NPT fitting, valve, instrument, or equipment connection — creating a threaded access point within a solvent-welded system in a single flush-profile fitting body without the protruding hex flats and added bulk of a standard hex bushing.

The 2-1/2" to 1" size differential is substantial, placing the 838-289 squarely in the branch tap and instrument connection application profile rather than the main-flow transition category. A 1" FPT outlet off a 2-1/2" solvent-welded fitting is most appropriately used for pressure gauge ports, chemical dosing inlets, drain valve connections, sampling taps, and small-diameter secondary branch lines where flow volume at the threaded port is modest relative to the 2-1/2" main line capacity. Where meaningful branch flow is required, a larger-outlet bushing should be evaluated to avoid excessive velocity and pressure drop at the threaded port.

Compared to the corresponding 3" inlet 838-335 (3" x 1"), the 838-289 serves the same functional role — adding a 1" threaded access point to a solvent-welded system — but off a 2-1/2" fitting body. This makes the 838-289 the appropriate choice in systems where the main line runs at 2-1/2" rather than 3", preserving design consistency and avoiding the need for an intermediate size transition simply to accommodate a small-diameter threaded branch or instrument port. The 1" FPT outlet provides access to a wide selection of compatible NPT-threaded ball valves, gate valves, pressure instruments, chemical injectors, and inline components — broader compatibility than a 3/4" outlet while remaining clearly in the instrument and branch tap size range.

Manufactured to ASTM D2464 standards and listed under NSF/ANSI 14, the 838-289 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:

• Chemical Processing — Installed in 2-1/2" Schedule 80 solvent-welded chemical distribution headers to provide a 1" threaded port for pressure gauge connections, chemical dosing inlets, injection quills, sampling taps, and small-diameter secondary chemical feed lines in systems handling acids, bases, and aggressive industrial fluids where a threaded access point is required at a 2-1/2" fitting socket
• Pump Systems & Mechanical Rooms — Used at 2-1/2" Schedule 80 pump discharge or suction fitting bodies to introduce a 1" threaded gauge port, pressure relief connection, drain valve, or auxiliary instrument tap without requiring a separate threaded fitting body or saddle connection on the main pipe run; the 1" FPT outlet provides broad compatibility with standard NPT-threaded pressure instruments and valves
• Industrial Manufacturing — Applied in process piping systems where a 2-1/2" Schedule 80 solvent-welded main must provide a compact 1" threaded access point for instrumentation, chemical injection, drain connections, or small-diameter secondary process lines at a fitting socket; the flush profile keeps the assembly tight in panel piping and crowded mechanical room layouts
• Municipal Water & Wastewater — Installed at 2-1/2" Schedule 80 fitting bodies in pump stations, treatment facilities, and distribution infrastructure where a 1" threaded branch is needed for pressure monitoring, chemical dosing, sampling connections, or small-diameter service taps within a permanent solvent-welded Schedule 80 system
• Commercial Plumbing — Used in mechanical room Schedule 80 piping where a 2-1/2" solvent-welded service line must provide a 1" threaded connection for a drain valve, pressure gauge, bypass tap, or small-diameter equipment service port; the broad availability of 1" NPT-threaded valves and instruments makes this outlet size a practical and flexible choice for future equipment changes
• Irrigation & Agricultural — Applied at pump discharge assemblies and filter station headers in large-scale irrigation systems where a 2-1/2" Schedule 80 solvent-welded fitting must provide a 1" threaded port for a chemical injector, air release valve, pressure gauge connection, or small-diameter control line without requiring a separate threaded adapter body at the branch point
• Water Treatment & Filtration — Provides a 1" threaded instrument or dosing port at 2-1/2" Schedule 80 fitting connections in multi-stage water treatment systems, filter manifolds, and chemical injection assemblies where the wide range of 1" NPT-compatible valves and monitoring instruments supports design flexibility within a permanent solvent-welded 2-1/2" Schedule 80 piping network