Bullhead Tee, Slip x Slip x Slip PVC Schedule 80 6" x 6" x 10" (801-537)

The 6" x 6" x 10" Schedule 80 Gray PVC Bullhead Tee (801-537, Slip x Slip x Slip) is a large-diameter, heavy-wall specialty tee fitting manufactured to ASTM D2467 in Schedule 80 gray PVC — a configuration that is fundamentally different from a standard or reducing tee in both geometry and application. In a standard tee, the branch is equal to or smaller than the run; in a bullhead tee, the branch is larger than the run. In the 801-537, the two run connections are 6" and the branch is 10" — meaning flow arriving from two 6" run connections combines and exits through a single 10" branch, or flow arriving from a 10" primary main distributes into two 6" run connections simultaneously. This inverted flow geometry is the defining characteristic and the specific functional advantage of the bullhead tee configuration, and it makes the 801-537 the correct fitting for the collection and distribution manifold applications that cannot be served by any other single fitting in the Schedule 80 PVC line: large-diameter pump station suction and discharge collection headers, water treatment plant primary distribution manifolds, municipal well field collection mains, industrial process piping primary distribution headers, and large-scale agricultural and commercial irrigation pump station manifolds where multiple same-diameter branch flows must be collected and combined into a single larger-diameter primary main — or where a single large-diameter primary flow must be divided and distributed into multiple smaller branch connections — within a single fitting body.

The bullhead tee geometry at the 6" x 6" x 10" size is a large-diameter manifold engineering decision, and it reflects a specific hydraulic design logic that is worth understanding fully before specification: in a two-pump or multi-source system where each pump or source discharges into a 6" line, combining the two 6" flows at a tee into another 6" run creates the velocity increase, turbulence, and backpressure associated with combining full-flow 6" streams into an equal-diameter run — a hydraulically inefficient arrangement that reduces system performance and increases wear on downstream components. The bullhead configuration routes the combined flow from both 6" runs into a 10" branch, accommodating the combined volumetric flow of both runs in a larger header that maintains manageable velocity, reduces turbulence at the combination point, and presents the correct primary main size to downstream distribution equipment, treatment systems, or storage connections. Conversely, in a distribution manifold where a 10" primary main must split into two equal 6" branches — for zone isolation, redundant supply paths, or parallel distribution to two equipment trains — the 801-537 provides a single-body solution for the 10"-to-two-6" split within a single fitting that eliminates the fabricated multi-fitting manifold assemblies that would otherwise be required. For large-diameter PVC piping engineers specifying the pump station header, the collection manifold, or the primary distribution split on commercial, industrial, and municipal systems in Schedule 80 gray PVC, the 801-537 is the one-piece Schedule 80 solution for what would otherwise require a custom-fabricated tee assembly, a weld fitting adapter, or a multi-fitting workaround that adds installation complexity, leak points, and hydraulic inefficiency to the primary manifold connection.

Schedule 80 gray PVC construction is the correct material specification for this fitting across every application where the 6" x 6" x 10" bullhead tee configuration is required. The Schedule 80 wall thickness and gray color identification satisfy the material class requirements of every commercial and industrial Schedule 80 piping system specification at the large-diameter manifold and primary header level — chemical resistance across the full range of water treatment chemicals, process water service, irrigation supply, and moderate-concentration chemical distribution; NSF 61 listing for potable water contact; and the structural wall thickness that a large-diameter manifold fitting requires to handle the internal pressure, hydraulic forces at the flow combination or distribution point, and the mechanical loads of supporting the connected 6" and 10" pipe runs without deflection or joint stress at the primary header location. The gray color provides permanent, inspectable material class identification at the most critical fitting location in the system — the primary manifold — where material class confirmation is most important for system commissioning, inspection, and long-term maintenance documentation. All three socket ends solvent cement directly onto standard IPS Schedule 40 or Schedule 80 PVC pipe of the corresponding nominal sizes — 6" IPS schedule pipe on both run connections, 10" IPS schedule pipe on the branch — using heavy-body solvent cement appropriate for the large bonding surface areas at each socket. At the 6" and especially the 10" socket connection sizes, joint assembly requires deliberate, pre-planned technique with full circumferential heavy-body cement coverage, complete socket seating before initial set begins, and mandatory full cure time compliance before system pressurization — joint integrity at large-diameter primary manifold connections is non-negotiable, and the cure time requirements at large socket diameters must be observed in full regardless of schedule pressure.

NSF 61 certification lists this fitting for potable water contact, and NSF 14 covers compliance with applicable plastics piping material standards — making it the correct large-diameter manifold fitting for municipal water treatment and distribution systems, potable water pump station headers, and large commercial and institutional water supply distribution manifolds where NSF-listed materials are required at every fitting in the primary distribution system. ASTM D2467 governs Schedule 80 PVC socket fittings and the manufacturing, dimensional, and pressure performance requirements the 801-537 is produced to. Verify manufacturer pressure rating documentation for the specific fitting configuration before final system specification — as with all large-diameter specialty tee fittings, the governing pressure rating at the 6" x 6" x 10" bullhead configuration is determined by the largest port size (10") and the fitting's tested performance at the bullhead geometry, and should be confirmed against the manufacturer's published pressure-temperature rating table for this SKU before installation in systems at or near the fitting's rated pressure ceiling.

Key Features:

• Schedule 80 gray PVC bullhead tee — 6" run x 6" run x 10" branch, all socket (slip) ends
• Bullhead configuration — branch (10") larger than run (6") for collection and distribution manifold service
• Combines two 6" run flows into a single 10" branch — or splits one 10" primary into two 6" distribution branches
• Manufactured to ASTM D2467 — the governing standard for Schedule 80 PVC socket fittings
• NSF 61 certified for potable water contact; NSF 14 listed
• Solvent cement socket connections compatible with Schedule 40 and Schedule 80 IPS pipe
• Gray color — universal Schedule 80 material class identification at the primary manifold location
• Single-body solution for large-diameter manifold configurations that would otherwise require custom fabricated assemblies
• Cell classification PVC 12454 per ASTM D1784
• Heavy-body solvent cement required at all three socket connections; full cure time compliance mandatory before pressurization

Specifications:

Industries & Applications:

• Pump Station — Collection & Discharge Headers — The 6" x 6" x 10" bullhead tee is the single-body manifold fitting for multi-pump station configurations where two pump trains each discharge into a 6" pipe and the combined flow must be routed into a 10" primary collection header; in well pump stations, booster pump stations, irrigation pump stations, and water treatment plant pump rooms where two parallel 6" pump discharge connections feed a single 10" primary distribution main, the 801-537 provides the hydraulically correct combination point — routing the combined flow of both 6" discharges into a 10" branch that accommodates the full combined volumetric flow without the velocity increase and turbulence that combining into an equal 6" run would create; Schedule 80 construction satisfies the material specification requirements at the most hydraulically active location in the pump station — the primary manifold connection where pressure, velocity, and hydraulic forces are at their highest in the system
• Municipal Water Treatment & Distribution — Installed at primary distribution manifold connections in municipal water treatment plants, regional water distribution pump stations, well field collection headers, and municipal water storage facility distribution connections where two 6" source or distribution connections must be combined into a 10" primary transmission main, or where a 10" primary main must be split into two 6" distribution branches serving parallel treatment trains, filter banks, or distribution zones; NSF 61 listing makes this fitting appropriate for every potable water treatment and distribution manifold application at this fitting configuration, and Schedule 80 gray PVC construction satisfies the material class requirements of municipal water treatment and distribution piping specifications at large-diameter primary manifold connections
• Industrial Process Piping — Primary Distribution Manifolds — Used at 6" x 6" to 10" primary manifold connections in large manufacturing plants, chemical processing facilities, petrochemical support facilities, and heavy industrial environments where process water, cooling water, or utility water primary distribution headers require a large-diameter bullhead combination or distribution fitting at the primary manifold level; Schedule 80 gray PVC construction provides the chemical resistance, structural wall thickness, and material class identification required at large-diameter primary manifold connections in industrial process piping systems where Schedule 80 is the system-wide material standard; the single-body bullhead fitting eliminates the multi-fitting fabricated manifold assemblies that add installation complexity, joint count, and potential leak points at the primary header connection
• Large Commercial & Agricultural Irrigation — Pump Station Manifolds — At large golf course, agricultural, and municipal landscape irrigation pump stations where multiple pump units discharge into parallel 6" connections and the combined station discharge must be routed into a single 10" primary distribution main, the 801-537 provides the Schedule 80 PVC bullhead manifold fitting that combines both pump discharge flows at the station header; irrigation pump station manifold design at this scale requires a fitting that accommodates the combined flow of both pump trains in the 10" branch at full pump station output without introducing flow restriction, backpressure, or turbulence that reduces pump efficiency and system distribution pressure; the bullhead geometry delivers the hydraulically correct combination point for two-pump 6" discharge manifolds feeding a 10" primary distribution main
• Water & Wastewater Treatment — Process Manifolds — Used at primary collection and distribution manifold connections in biological treatment processes, filtration system primary headers, sedimentation basin influent and effluent connections, and sludge handling primary distribution manifolds where two parallel 6" process connections must be combined into a 10" primary process main, or where a 10" primary process main must be distributed into two parallel 6" treatment trains; the bullhead configuration serves both the collection and distribution manifold roles within a single fitting body, and Schedule 80 gray PVC construction provides the chemical resistance and structural integrity required at large-diameter primary manifold connections in aggressive treatment process environments
• Aquaculture & Large Recirculating Systems — Used at primary collection and distribution manifold connections in large commercial aquaculture facilities, regional hatchery systems, and large recirculating aquaculture systems (RAS) where two parallel 6" recirculation, filtration, or water conditioning connections must be combined into a 10" primary header, or where a 10" primary water supply or recirculation main must be split and distributed into two parallel 6" system branches; Schedule 80 PVC construction handles the continuous water contact, disinfectant, and oxygen dosing chemical exposure of commercial aquaculture service, and NSF 61 listing confirms fitness for potable and process water contact at every manifold fitting connection in the primary system
• HVAC & Large Commercial Mechanical Systems — Specified at 6" x 6" to 10" primary manifold connections in large commercial chilled water systems, condenser water primary distribution headers, and large-capacity hydronic heating and cooling primary manifolds where two 6" chilled or condenser water connections feed a single 10" primary distribution header; the bullhead configuration provides the hydraulically correct large-diameter manifold fitting for two-connection-to-primary-header configurations at the largest commercial HVAC primary distribution manifold sizes where Schedule 80 PVC is the system material standard and the primary manifold connection requires a rated, certified, single-body Schedule 80 fitting rather than a fabricated multi-fitting assembly
• Custom Engineered Manifold Systems — The 801-537 is a specialty Schedule 80 PVC fitting that serves engineered system configurations across industries — chemical processing skids, large filtration system manifolds, industrial cooling water headers, process water primary collection systems, and any large-diameter PVC piping application where the specific hydraulic requirement is a single-body fitting that combines two 6" flows into a 10" primary header or distributes a 10" primary flow into two 6" branches in Schedule 80 gray PVC; for engineers and system designers specifying large-diameter Schedule 80 PVC manifold configurations, the 801-537 is the catalog fitting that eliminates field-fabricated solutions and provides a manufactured, rated, NSF-listed, ASTM D2467-compliant single-body solution for the 6" x 6" x 10" bullhead manifold configuration