Bullhead Tee, Slip x Slip x Slip PVC Schedule 40 3/4" x 3/4" x 1" (401-102)

This 3/4" × 3/4" × 1" Schedule 40 PVC Bullhead Tee provides a specialized three-socket solvent-cemented branch fitting where the branch outlet is larger than the run ports — with two 3/4" slip socket run ports and a 1" slip socket branch outlet, all accepting their respective PVC pipe sizes for solvent cement joining. The bullhead configuration reverses the standard size hierarchy of a reducing tee, making the branch the largest connection rather than the smallest.

The bullhead tee is a distinctly specialized fitting type that serves hydraulic and layout requirements that no standard equal or reducing tee can address. In a standard reducing tee, the run ports are equal to or larger than the branch — the run carries primary flow and the branch taps off a smaller secondary supply. In a bullhead tee, the branch is larger than the run — a configuration that serves two specific and well-defined system contexts.

The first is collection or return header assemblies. When two parallel 3/4" return lines or supply branches must combine their flows into a single larger 1" header or main, the bullhead tee accomplishes the convergence at the tee body — the two 3/4" run ports receive flow from parallel pipe runs and the combined flow exits through the larger 1" branch socket into the primary header. This collection function appears in irrigation return headers where parallel zone supply lines converge, in pump suction manifolds where multiple suction branches combine into a primary suction main, in pool and spa recirculation systems where parallel return lines from multiple inlets collect into a main return header, and in any system where two parallel secondary flows must be aggregated into a single larger primary pipe at the tee position.

The second context is parallel distribution from a primary supply. When a single larger 1" supply main must simultaneously feed two parallel 3/4" distribution branches — providing equal, simultaneous supply to two downstream circuits from a single primary connection point — the bullhead tee delivers both 3/4" branch runs from the 1" inlet at the same fitting body. This parallel-split function appears in irrigation systems where a 1" lateral must feed two equal 3/4" zone supply runs simultaneously, in pool and spa systems where a 1" pump discharge feeds two parallel 3/4" equipment supply branches, and in commercial plumbing systems where a 1" primary supply must divide equally into two 3/4" zone supply mains.

The hydraulic characteristics of the bullhead tee deserve attention in flow-sensitive system designs. When flow enters the 1" branch and splits into the two 3/4" run ports, the velocity increases as the flow cross-section reduces — consistent with any pipe size reduction. When flow enters from both 3/4" run ports and combines into the 1" branch, opposing flows from the two run ports converge at the tee center before exiting the branch — creating more turbulence at the junction than a standard tee where all branch flow enters or exits from a single side port. In pressure-critical, pump suction, or flow-metering applications, the turbulence characteristics of the bullhead configuration should be considered alongside the tee's connection function when evaluating installation positions.

The governing-end pressure rating of the 401-102 follows the standard principle that the largest bore carries the lowest pressure rating. At this bullhead tee, the 1" branch socket is the largest end and governs the fitting assembly at approximately 450 psi at 73°F — a meaningfully lower rating than the ~480 psi of the 3/4" run port sockets considered independently. The 1" branch governs whether flow is entering or exiting from that end.

Manufactured in white Schedule 40 PVC, this tee delivers reliable performance across residential, commercial, and light industrial piping applications. PVC's resistance to acids, bases, salts, chlorine, and common process fluids provides long service life where metal tees would corrode or contaminate the fluid stream. NSF/ANSI 61 and NSF/ANSI 14 listings confirm suitability for potable water contact.

Rated to 450 psi at 73°F (governed by the 1" branch socket end), this fitting handles standard pressure service across irrigation, pool and spa, commercial plumbing, water treatment, and light industrial applications. Three separate solvent-cemented joints must be made at installation. Clean and dry each pipe end and socket interior before application. Apply purple PVC primer to all mating surfaces — both 3/4" run port sockets and the 1" branch socket, and all three corresponding pipe ends. Apply a uniform coat of Schedule 40 PVC solvent cement to both the pipe end and socket interior at each joint before inserting. Insert each pipe with a slight quarter-turn twist and hold firmly for 30 seconds. Note that the 3/4" and 1" socket ends require different pipe sizes — confirm the correct pipe is aligned to each socket before cementing. Stagger the three joints where possible and allow full cure time per the cement manufacturer's temperature and humidity guidelines before pressurizing. Apply published pressure derating factors for service temperatures above 73°F.

Specifications:

Industries & Applications:

• Irrigation Collection Headers & Return Manifolds — Collects flow from two parallel 3/4" zone supply runs or return lines into a single 1" collection header at manifold and zone return positions in residential and commercial irrigation systems — the defining bullhead tee application where the two 3/4" run ports receive parallel zone flows and the combined flow exits through the larger 1" branch socket into the primary return or collection header; eliminates the need for a larger equal tee plus reducing couplings to accomplish the same convergence at a single fitting body
• Parallel Zone Supply Splits from 1" Mains — Provides simultaneous equal supply to two parallel 3/4" zone or lateral runs from a single 1" lateral or supply main at irrigation system distribution positions where the 1" primary lateral must feed two equal 3/4" zone branches simultaneously — the 1" branch socket receives the primary supply and the two 3/4" run port sockets deliver simultaneous parallel supply to the downstream zones within a single compact tee body
• Pool, Spa & Aquaculture Return Headers — Collects parallel 3/4" return line flows from multiple pool or spa inlet fittings, skimmer connections, or equipment returns into a single 1" primary return header in residential and commercial pool and spa recirculation systems where the bullhead configuration accomplishes the parallel return collection at the tee body before the combined flow enters the primary recirculation main
• Pump Suction Manifolds — Collects flow from two parallel 3/4" suction branch lines into a single 1" primary suction approach run at pump suction manifold positions in residential and commercial pump station assemblies and pool pump installations where the bullhead tee accomplishes the parallel suction collection before the combined flow approaches the pump inlet
• Commercial Plumbing Distribution — Provides parallel supply from a 1" primary distribution main to two simultaneous 3/4" branch supply runs at distribution manifold positions in commercial building water supply and mechanical room systems where the 1" primary supply must divide equally to feed two parallel 3/4" zone or equipment supply branches at the same tee position
• Water & Wastewater Treatment — Collects flow from parallel 3/4" secondary distribution or process return branches into a single 1" primary collection header at process piping convergence points in light-duty water treatment facility process and distribution systems where the bullhead configuration accomplishes parallel branch aggregation at the tee body position
• Light Industrial Process Piping — Provides a parallel collection or parallel distribution function at 3/4" × 1" size transition tee positions in light industrial and chemical handling Schedule 40 PVC systems where two parallel 3/4" process branches must converge into a 1" collection main or a single 1" supply must divide equally into two 3/4" process branches at the same fitting location