Reducing Tee, Slip x Slip x Slip PVC Schedule 80 10" x 10" x 8 (801-628)

The 10" x 10" x 8" Schedule 80 Gray PVC Reducing Tee (801-628, Slip x Slip x Slip) is a large-diameter, heavy-wall specialty tee fitting manufactured to ASTM D2467 in Schedule 80 gray PVC — a reducing tee configuration in which the run connections are 10" and the branch connection is 8", providing a single-body Schedule 80 PVC solution for taking a major 8" branch connection off a 10" primary main without reducing the primary flow path diameter, without field-fabricated saddle taps or custom manifold assemblies, and without transitioning out of Schedule 80 gray PVC construction at the branch takeoff point. The 801-628 is the correct fitting where a 10" Schedule 80 PVC primary main must supply an 8" branch connection — where the branch flow requirement has been established by hydraulic analysis at 8", where the system has been designed to Schedule 80 material class and pressure requirements throughout, and where every branch connection fitting must be a manufactured, rated, NSF-listed, ASTM D2467-compliant Schedule 80 gray PVC component at the primary main branch connection point.

The 10" x 10" x 8" configuration occupies the most hydraulically significant position in the 10" run Schedule 80 PVC reducing tee series. The 8" branch at 80% of the 10" run diameter is the largest branch-to-run ratio available in the standard 10" run reducing tee line — a near-equal configuration that is meaningfully different in both hydraulic character and application profile from smaller-branch reducing tees at the 10" run size. In the hydraulic design logic of large-diameter primary PVC systems, the 8" branch off a 10" run reflects a branch flow analysis establishing that the downstream zone, sector, or parallel system carries the large majority of the primary main's flow capacity — a branch proportion too large for any smaller-branch reducing tee configuration at this run size without unacceptable velocity increase and pressure loss at the branch entry, yet specifically sized at 8" rather than an equal 10" because the downstream distribution system pipe size, the zone valve specification, or the equipment supply design has established 8" as the correct branch pipe diameter at this connection point. For commercial irrigation engineers, municipal water system civil engineers, industrial process piping mechanical engineers, and water treatment plant design engineers specifying this large-branch flow profile on 10" primary mains, the 801-628 is the catalog Schedule 80 PVC fitting that provides the manufactured, rated, specification-compliant single-body solution for the 10" primary to 8" major branch takeoff that no smaller-branch reducing tee in the 10" run series can serve and that does not require the equal-diameter 10" equal tee configuration.

Schedule 80 gray PVC construction is the correct and only material specification for this fitting across every application where the 10" x 10" x 8" reducing tee configuration is required in a Schedule 80 piping system. The Schedule 80 wall thickness at both the 10" run and the 8" branch dimensions provides the structural integrity, pressure performance, and mechanical robustness required at a 10" primary main near-equal branch connection — where internal pressure forces are among the highest in the commercial PVC fitting line, where the 8" branch entry hydraulic forces impose lateral loading on the tee body proportional to the large branch port area and the high branch flow volume approaching 80% of the primary run capacity, and where the fitting must support the combined weight, thermal movement, and operational conditions of connected 10" primary main pipe runs and an 8" branch pipe run simultaneously at the primary manifold location. The near-equal branch-to-run ratio at 801-628 means the flow division and pressure dynamics at the tee junction are more complex than at configurations with smaller branch-to-run ratios — the 8" branch carries sufficient flow relative to the 10" run that the hydraulic interaction between the straight-run continuation and the branch takeoff is a material factor in the system's hydraulic design, and the Schedule 80 wall thickness throughout the tee body provides the structural margin that this hydraulically active junction requires under sustained primary main service conditions. The gray color provides permanent, inspectable Schedule 80 material class identification at the primary main branch connection — the critical fitting location where material class confirmation is required for system commissioning, AHJ inspection, and long-term infrastructure asset management documentation across the service life of the installation. PVC Type 1 Grade 1 construction with cell classification 12454 per ASTM D1784 provides broad chemical resistance across water treatment chemicals, process water service, industrial utility water, and the full range of non-solvent process fluids appropriate for Schedule 80 PVC primary main service. All three socket ends solvent cement directly onto standard IPS Schedule 40 or Schedule 80 PVC pipe of the corresponding nominal sizes — 10" IPS schedule pipe on both run ports and 8" IPS schedule pipe on the branch port. At the 10" socket connections, joint assembly requires the deliberate, technically demanding approach appropriate for large-diameter Schedule 80 PVC socket joints: heavy-body solvent cement rated for large-diameter Schedule 80 PVC is mandatory at all three connections, pre-planned assembly with all components accessible and positioned before cement application begins is essential, full circumferential heavy-body cement coverage across the complete bonding surface of each pipe end and fitting socket must be achieved at both the 10" run sockets and the 8" branch socket, and full cure time compliance before any system pressurization is non-negotiable at this primary main connection where partial cure under system pressure carries severe operational and infrastructure consequences.

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 primary main branch fitting for municipal water treatment and distribution systems, large potable water pump station distribution headers, and large commercial and institutional water supply primary mains where NSF-listed materials are required at every fitting in the primary distribution system. ASTM D2467 governs Schedule 80 PVC socket fittings and defines the manufacturing, dimensional, and pressure performance requirements the 801-628 is produced to. Verify manufacturer pressure rating documentation for the specific fitting configuration before final system specification — at the 10" x 10" x 8" Schedule 80 reducing tee configuration, the governing pressure rating is determined by the largest port size (10") and the fitting's tested performance at this large-diameter near-equal reducing geometry, and must be confirmed against the manufacturer's published pressure-temperature rating table for SKU 801-628 before installation in systems at or near the fitting's rated pressure ceiling.

Key Features:

• Schedule 80 gray PVC reducing tee — 10" x 10" run x 8" branch, all socket (slip) ends
• Near-equal reducing configuration — 8" branch at 80% of 10" run diameter; the largest branch-to-run ratio in the 10" run Schedule 80 reducing tee series
• Serves high-volume zone supply, major parallel system connections, and primary sector distribution branches where branch flow approaches the full primary run capacity
• 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 at both run and branch sizes
• Gray color — universal Schedule 80 material class identification at the primary main branch connection
• Single-body fitting for 10" primary main to 8" major branch takeoff — eliminates field-fabricated saddle taps and custom manifold 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
• Pressure rating: verify against manufacturer pressure-temperature table for SKU 801-628

Specifications:

Industries & Applications:

• Municipal Water Distribution — Primary Transmission Main Near-Equal Branch Connections — The 10" x 10" x 8" Schedule 80 reducing tee is specified at high-volume 8" branch takeoff points on 10" municipal water transmission and primary distribution mains where the branch flow analysis has established 8" as the correct branch pipe size — connections supplying 8" primary zone transmission laterals, major pressure zone supply headers, large-diameter sector distribution branches, and high-volume parallel distribution trunk branches where the branch flow requirement represents the large majority of the primary main's capacity and both a smaller-branch reducing tee and a full equal 10" tee fail to serve the branch flow specification correctly; at municipal scale, every fitting on a 10" primary transmission main is a formally specified, permitted, and inspected infrastructure component — the 801-628 provides the manufactured, rated, NSF-listed, ASTM D2467-compliant single-body Schedule 80 PVC solution for the near-equal 8" branch connection requirement at primary transmission main junction points in large municipal PVC water distribution system construction
• Water Treatment Plant — Primary Header Near-Equal Branch Connections — Installed at high-volume 8" branch connection points on 10" primary distribution headers in municipal and industrial water treatment plants — clearwell supply and distribution primary trunks supplying major 8" zone distribution headers, filter influent and effluent primary headers branching to large parallel filter train supply connections at the 8" service size, backwash primary supply mains connecting to 8" backwash equipment headers, and plant service water primary headers supplying 8" major equipment supply branches where the branch carries a large majority of the primary header flow; the 8" branch at 80% of the 10" run is the correct specification at water treatment plant primary header locations where the branch serves the largest individual equipment train or distribution zone in the system and where both smaller-branch reducing tees and the equal 10" tee fail to match the hydraulic design's branch pipe size requirement; NSF 61 listing makes this fitting appropriate for every potable water treatment primary distribution near-equal branch connection in Schedule 80 PVC systems
• Pump Station — Primary Header to High-Volume Branch Supply Connections — Used at 8" near-equal branch supply connections off 10" primary pump station headers in large pump stations, booster pump stations, well field pump stations, and water storage facility pump rooms where the 10" primary pump discharge or suction header must supply an 8" branch connection to the largest pump train, a high-volume pressure zone supply carrying the majority of the station output, a major parallel pump station primary header, or a large-capacity zone isolation valve assembly; the near-equal branch proportion at the 801-628 means that at pump station primary header level this fitting is specified where the branch carries so large a fraction of the primary flow that even a modest branch size reduction from 10" to 8" creates the velocity and pressure differential that justifies the branch pipe's 8" design size; Schedule 80 construction satisfies the material specification requirements at this most hydraulically active location in the pump station primary piping
• Industrial Process Piping — Primary Header Near-Equal Branch Takeoffs — Used at high-volume 8" branch takeoff points on 10" process water primary headers, cooling water primary distribution trunks, plant utility water primary mains, and large-volume industrial process fluid primary distribution headers in manufacturing plants, chemical processing facilities, petrochemical support facilities, and heavy industrial environments where the 10" primary process header must supply an 8" branch to the largest equipment section, the highest-flow process unit, or the primary parallel distribution system carrying the largest portion of the primary header flow; the 8" branch at 80% of the 10" run is the correct specification at industrial primary header branch locations where the branch flow analysis establishes that the downstream section demand requires 8" pipe and where a smaller-branch reducing tee would create unacceptable pressure and velocity conditions at the branch entry under peak process flow conditions; Schedule 80 gray PVC construction provides the chemical resistance, structural wall thickness, and material class documentation required at large-diameter primary header near-equal branch connections in industrial process piping systems where Schedule 80 is the system-wide material standard
• Large Commercial & Agricultural Irrigation — Primary Trunk Near-Equal Zone Branch Connections — Specified at high-volume 8" branch takeoff points on 10" primary irrigation transmission mains at the largest commercial irrigation systems — major golf course and resort irrigation systems, large-acreage agricultural operations, and regional landscape irrigation projects where a 10" primary transmission main must supply an 8" major zone transmission branch or sector supply header carrying the largest portion of the primary station output to the primary irrigation zone or sector; the 8" branch is the correct specification where the zone or sector flow requirement is established by hydraulic analysis at 8" pipe and where a smaller-branch connection would create unacceptable pressure loss under peak zone demand conditions; the 801-628 provides the manufactured, rated Schedule 80 PVC single-body solution for this primary transmission main near-equal zone branch configuration at the largest commercial and agricultural PVC irrigation system scale
• Industrial Water & Wastewater Treatment — Primary Process Header Near-Equal Branch Connections — Installed at high-volume 8" branch connections on 10" primary process distribution headers in industrial wastewater treatment, water reclamation, and large-scale industrial water management facilities — clarifier influent primary headers supplying the largest individual 8" treatment train connections, primary effluent distribution mains branching to major disposal or reuse system connections, aeration system primary air and water distribution headers supplying 8" high-volume zone connections, and primary sludge handling distribution headers serving the largest-capacity dewatering equipment connections; the near-equal branch-to-run ratio at the 801-628 means this fitting is specified at primary process header branch locations where the branch serves the single largest process section in the system, and where the flow proportion establishes 8" as the hydraulically correct branch pipe size rather than a smaller reducing connection or an equal tee
• HVAC & Large Commercial Mechanical Systems — Primary Main Near-Equal Branch Supply — Specified at high-volume 8" branch supply connections on 10" primary chilled water distribution mains, condenser water primary trunks, and large-capacity hydronic heating and cooling primary distribution headers in large commercial campus, institutional, and industrial mechanical systems where the 10" primary distribution main must supply an 8" major branch to the largest building loop, the highest-capacity mechanical room supply header, or the primary parallel distribution zone carrying the largest portion of the primary system flow; the 8" branch at 80% of the 10" run is the correct specification where the downstream loop or zone load establishes 8" as the required supply and return pipe size and where both a smaller-branch reducing tee and the equal 10" tee fail to match the branch pipe size required by the HVAC system hydraulic and equipment design; Schedule 80 PVC construction satisfies the material specification requirements at 10" primary distribution branch connections in large commercial mechanical systems where Schedule 80 is the system material standard
• Aquaculture & Large-Scale Water Management Infrastructure — Used at high-volume 8" branch connections on 10" primary water supply, recirculation, or distribution headers at the largest commercial aquaculture facilities, regional hatchery systems, and large recirculating aquaculture systems (RAS) where the primary distribution system has been specified in Schedule 80 PVC and a near-equal 8" branch connection serves the largest parallel filtration train, the highest-volume aeration system primary supply, or the primary water conditioning section carrying the large majority of the primary header flow; the near-equal branch configuration at the 801-628 is specified in aquaculture primary distribution systems where the branch section flow requirement is too large for any smaller-branch reducing tee at the 10" run size without unacceptable flow restriction; Schedule 80 PVC construction handles the continuous water contact and treatment chemical exposure of commercial aquaculture primary infrastructure, and NSF 61 listing confirms fitness for potable and process water contact at the primary distribution tee junction