Bushing, MPT x FPT (Flush Style) PVC Schedule 80 2" x 1" (839-249)

The 839-249 is a PVC Schedule 80 flush bushing that reduces a 2" female-threaded port or fitting down to a 1" male-threaded connection using an all-threaded MPT × FPT configuration. The 2" male NPT threads on the large end engage an existing 2" FPT fitting, valve body, tank outlet, or threaded port, while the 1" female NPT threads on the small end accept any standard 1" male-threaded fitting, nipple, or valve.

The 2" to 1" transition is the most common single-step reduction in this size range — appearing frequently at pump discharge ports, large valve bodies, manifold outlets, and equipment connections where a 2" primary line feeds a 1" service branch, bypass line, or equipment supply connection. As a single-step reduction, the 839-249 provides a more gradual cross-sectional area change than the larger reductions available in the 839 series (839-248 at 2" × 3/4" and 839-247 at 2" × 1/2"), making it the preferred choice in flow-sensitive circuits where abrupt diameter changes could introduce turbulence or velocity concerns.

The flush style is the defining feature that separates the 839 series from the 838 hex bushing series. The 839-249's large end is fully threaded from face to face with no raised hexagonal shoulder, allowing it to thread completely into a 2" FPT socket and sit flush or recessed without any protruding profile above the fitting face. In tight piping assemblies, panel-mounted configurations, threaded manifolds, or installations where adjacent components leave no clearance for a hex shoulder, the flush bushing resolves spatial conflicts that would otherwise require rerouting or redesigning the assembly.

Because no hex flats are present on the large end, installation requires a strap wrench or chain wrench — a standard open-end or adjustable wrench has no purchase surface on the fitting body. PTFE thread tape or an approved pipe thread sealant should be applied to the male threads before assembly. Engagement should begin hand-tight, followed by one to two additional turns with the strap wrench to achieve a leak-free seat. Threaded PVC fittings require meaningfully less torque than metal pipe fittings of the same size — over-tightening is a leading cause of stress cracking at the thread engagement zone, and metal pipe wrenches applied directly to the PVC body should always be avoided.

Manufactured from rigid PVC Type I, Grade I (Cell Classification 12454) to ASTM D2464, the 839-249 provides broad corrosion resistance across acids, bases, salts, oxidizing agents, and many industrial process fluids. NSF/ANSI 61 certification confirms suitability for potable water contact. The 1" FPT small end governs the pressure rating for the assembled fitting at 370 PSI @ 73°F. Specifiers comparing fittings across the 839 series should note that this is the lowest governing-end pressure rating among the 2"-large-end 839 SKUs — the smaller 3/4" and 1/2" outlet sizes on 839-248 and 839-247 respectively carry higher governing-end ratings due to the inverse relationship between pipe size and threaded pressure rating in Schedule 80 PVC at this size range.

Specifications:

Industries & Applications:

• Industrial & Chemical Processing — Single-step reductions from 2" process headers, valve ports, or tank outlets to 1" branch lines, equipment inlets, or service connections in corrosive service environments where the flush profile keeps the assembly compact and interference-free
• Pump & Valve Bodies — Reducing 2" NPT pump discharge or suction ports to 1" downstream piping without extending the assembly with nipples or intermediate reducing fittings; one-step reduction minimizes installed length at the connection point
• Water Treatment & Purification — NSF 61 listing supports potable water service; 2" to 1" transitions are common at filter housing inlets, treatment vessel ports, and distribution manifold branches in water treatment infrastructure
• Chemical Metering & Dosing Systems — Reducing 2" storage tank or pump ports to 1" distribution or injection headers on skid-assembled dosing systems where the flush profile is required by layout constraints
• Irrigation & Agricultural Infrastructure — Step-down connections at 2" mainline valve bodies or filter housings to 1" lateral or control zone piping in large-format irrigation systems
• Commercial & Mechanical Plumbing — Reducing 2" threaded fitting ports to 1" service connections in commercial mechanical rooms, equipment pads, and utility piping assemblies where future serviceability and compact layout are both design priorities
• OEM & Skid-Mounted Equipment Fabrication — Clean, low-profile single-step reduction for factory-built assemblies where a 2" port must transition to 1" field connection piping without a protruding hex shoulder complicating enclosure fit or component clearance