Bushing, Spigot x FPT (Flush Style) PVC Schedule 80 3" x 1-1/4" (838-336)

The 3" x 1-1/4" PVC Schedule 80 Flush Bushing (Spigot x FPT) provides a compact, pressure-rated transition from a 3" Schedule 80 socket fitting down to a 1-1/4" female NPT threaded port. The spigot end inserts directly into the socket of an existing 3" Schedule 80 fitting, while the 1-1/4" FPT socket accepts any standard 1-1/4" male NPT fitting, valve, equipment connection, or threaded adapter — creating a threaded interface within a solvent-welded system in a single flush-profile fitting body.

Within the 838-33x sub-series, the 838-336 sits at the mid-range of the outlet-size progression, stepping above the instrument-and-tap-oriented 838-334 (3/4") and 838-335 (1") while remaining below the higher-flow 838-338 (2") and near-equal 838-339 (2-1/2"). The 1-1/4" FPT outlet occupies a practical middle ground in the sub-series: large enough to carry a meaningful secondary flow — a branch service line, a bypass connection, a filter inlet, or a moderate-capacity equipment feed — while still representing a substantial reduction from the 3" main run that keeps the primary line's flow capacity largely intact. This positions the 838-336 as a fitting that bridges the gap between the minimal-flow instrument tap applications of the smaller outlets and the near-full-flow equipment interface applications of the larger ones.

It is worth noting that 1-1/4" is less prevalent as a standard connection size in modern commercial and industrial piping than 1", 1-1/2", or 2" — a characteristic that makes the 838-336 somewhat more specialized than its immediate neighbors in the sub-series. In new system design, engineers often step directly from 1" to 1-1/2" at branch connections, bypassing 1-1/4" entirely. The 838-336 is therefore most relevant in retrofit and renovation contexts where existing 1-1/4" threaded components — valves, nipples, equipment ports — must interface with a new or upsized 3" Schedule 80 solvent-welded system, and in applications where a specific equipment manufacturer specifies a 1-1/4" NPT threaded inlet on a body plumbed into a 3" PVC system.

Manufactured to ASTM D2464 standards and listed under NSF/ANSI 14, the 838-336 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 3" Schedule 80 solvent-welded chemical distribution headers to provide a 1-1/4" threaded port for secondary chemical feed lines, moderate-capacity dosing connections, bypass assemblies, and equipment interfaces in systems handling acids, bases, and aggressive industrial fluids where a flow-carrying threaded branch is needed at a 3" fitting socket
• Pump Systems & Mechanical Rooms — Used at 3" Schedule 80 fitting bodies on pump assemblies where an existing or specified 1-1/4" NPT-threaded valve, strainer, or auxiliary equipment port must interface with a solvent-welded 3" Schedule 80 system; particularly relevant where equipment manufacturers specify 1-1/4" NPT inlets on bodies plumbed into 3" PVC systems
• Industrial Manufacturing — Applied in process piping systems where a 3" Schedule 80 solvent-welded main must provide a 1-1/4" threaded branch connection for a secondary process line, bypass tap, or moderate-capacity equipment feed at a fitting socket; the flush profile keeps the assembly compact in panel piping and tight mechanical room configurations
• Municipal Water & Wastewater — Installed at 3" Schedule 80 fitting bodies in pump stations, treatment facilities, and distribution infrastructure where a 1-1/4" threaded branch is required for a service valve, chemical dosing connection, secondary distribution line, or equipment interface within a permanent solvent-welded Schedule 80 system
• Renovation & Retrofit Construction — The most practically significant application context for the 1-1/4" outlet size; well-suited for system upgrades and retrofits where existing 1-1/4" NPT-threaded valves, nipples, and equipment connections must be preserved and integrated into a new or upsized 3" Schedule 80 solvent-welded system without replacing the legacy threaded components
• Water Treatment & Filtration — Provides a 1-1/4" threaded equipment interface at 3" Schedule 80 fitting connections in water treatment systems, filter manifolds, and chemical injection assemblies where existing or specified 1-1/4" NPT-threaded components must connect into a permanent solvent-welded 3" Schedule 80 piping network