Reducing Tee, Slip x Slip x Slip PVC Schedule 80 1-1/2" x 1-1/2" x 1" (801-211)

The 801-211 is a 1-1/2" x 1-1/2" x 1" Schedule 80 PVC reducing tee with slip (socket) connections on all three ports, commonly referenced by its shorthand size designation of 1-1/2" x 1". Both run ends are 1-1/2 inches and the branch outlet is 1 inch — a single nominal step reduction at the branch. All three ports are solvent weld sockets with no threaded interfaces, making every joint in the assembly permanent once cemented. Within the 801-series 1-1/2-inch run sub-group, the 801-211 is the highest-capacity reducing branch configuration available — the 1-inch branch is just one nominal size below the 1-1/2-inch mainline, producing the closest approach to a full-bore branch that a reducing tee at this run size can deliver in an all-slip Schedule 80 configuration.

The 1-1/2-inch run passes mainline flow through the fitting body while the 1-inch branch delivers a near-full-bore service outlet carrying the vast majority of the pressure-flow capability of the mainline itself. At 1 inch, the branch is fully capable of supporting primary secondary distribution headers, major bypass assemblies, high-throughput equipment supply lines, and substantial flow branches where the downstream demand approaches the capacity of the 1-1/2-inch mainline. This is the correct branch size when a reducing tee is required but the branch flow demand is too high for the 3/4-inch bore of the 801-210 or when the branch serves a primary function rather than a secondary or supplemental one.

Understanding where the 801-211 fits within the complete 1-1/2-inch run sub-group is essential for correct product selection. The 801-209's 1/2-inch branch serves permanently cemented small-bore sub-lines for instrumentation and chemical injection. The 801-210's 3/4-inch branch serves genuine secondary distribution branches and moderate-flow zone supply connections. The 801-211's 1-inch branch serves the highest-flow branch requirements in this sub-group — primary bypass loops, major equipment supply connections, and secondary distribution headers that must carry near-mainline flow volumes. When the branch must be the same 1-1/2-inch size as the run and must remain threaded and serviceable, the 802-series straight tee with an FPT branch is the appropriate alternative; when a 1-inch branch in an all-permanent solvent weld assembly meets the flow requirement, the 801-211 is the more compact and structurally cleaner solution.

At 1-1/2-inch run size, the 801-211 appears across pool and spa equipment room piping, pump discharge and recirculation assemblies, chemical feed distribution, and pressurized irrigation systems. On pool and spa systems where 1-1/2-inch is the standard mainline size, a 1-inch branch is large enough to supply pump bypass loops, heater bypass connections, and equipment supply lines — applications where the 3/4-inch branch of the 801-210 would be undersized and a full same-size branch would exceed the downstream equipment connection size. The all-slip, all-permanent construction is consistent with the solvent weld build-out typical of Schedule 80 equipment room piping where no threaded branch interface is required at the tee location.

All three socket ends accept standard Schedule 80 PVC pipe for solvent weld assembly. The assembly pressure rating is governed by the 1-1/2-inch run ends at 280 PSI @ 73°F — the 1-inch branch end alone rates at 450 PSI, but the assembled fitting uses the lower of the two end ratings for system design purposes. The narrow 170 PSI spread between ends reflects the close nominal sizing of the 1-1/2-inch and 1-inch pipe sizes, consistent with the pattern established on the 801-168 (1-1/4" x 1") in the 1-1/4-inch run sub-group. Gray PVC delivers broad chemical resistance to acids, alkalis, salts, and many industrial process fluids. All three socket ends are manufactured and dimensioned to ASTM D2467 standards for Schedule 80 PVC socket fittings.

Specifications:

Pressure rating is for water service at 73°F. Assembly pressure rating is governed by the lower-rated 1-1/2-inch run ends at 280 PSI. The 1-inch branch end in isolation rates at 450 PSI — a narrow 170 PSI differential reflecting the close nominal sizing between run and branch ends — but does not govern the assembled fitting rating. Derate for elevated temperatures and aggressive chemical service per manufacturer guidelines. All three socket joints are permanent once cemented — confirm pipe alignment and branch orientation before cement sets.

Industries & Applications:

The 801-211 Schedule 80 reducing tee serves industrial, chemical, commercial, and residential piping applications wherever a 1-1/2-inch Schedule 80 PVC mainline requires a permanent all-solvent-weld, high-capacity 1-inch branch for major secondary distribution, high-throughput equipment supply, or near-full-bore bypass connections:

• Swimming Pool & Spa Equipment — High-capacity permanent branch connections on 1-1/2-inch Schedule 80 pool and spa recirculation mains where a 1-inch all-slip branch supplies pump bypass loops, heater supply and return branches, filter bypass connections, and large equipment supply lines — applications where the 801-210's 3/4-inch branch is undersized for the bypass or equipment flow demand and an all-permanent solvent weld branch is consistent with the fixed equipment room piping layout
• Chemical Processing & Water Treatment — Permanent near-full-bore branch connections on 1-1/2-inch chemical feed, chlorination, acid dosing, and reagent distribution headers where a 1-inch all-slip branch supplies major secondary treatment loops, high-volume chemical equipment connections, and primary bypass assemblies on permanently routed systems where the branch must carry near-mainline flow volumes in all-solvent-weld construction
• Pump Discharge & Recirculation Systems — High-capacity three-way permanent flow distribution on 1-1/2-inch pump discharge and recirculation headers where a 1-inch all-slip branch supplies primary bypass loops, major filter inlet connections, and high-flow secondary recirculation entries as a fixed, permanently cemented branch carrying the majority of the pump output in packaged pump and filtration assemblies
• Industrial Process Piping — Near-full-bore permanent reducing branch connections on 1-1/2-inch process distribution and utility water headers where a 1-inch all-slip branch supplies major secondary process lines, high-flow equipment connections, and primary loop bypass feeds at fixed three-way junction points where all-solvent-weld construction is specified for its joint integrity and elimination of threaded engagement surfaces
• Agricultural & Irrigation Systems — High-capacity permanent branch connections on 1-1/2-inch pressurized irrigation supply and pump discharge headers where a 1-inch branch feeds primary zone distribution mains, large-volume filter station inlets, and high-flow control equipment — applications where the 801-210's 3/4-inch branch would be undersized for the required zone flow demand and the branch pipe run is permanently routed throughout the field distribution network
• Municipal & Commercial Plumbing — Permanent near-full-bore reducing branches on 1-1/2-inch Schedule 80 utility water and service lines where a 1-inch all-slip branch supplies major fixture groups, primary secondary distribution mains, and high-capacity equipment connections as fixed permanent joints in systems where Schedule 80 pressure ratings and all-solvent-weld construction are both specified
• HVAC & Cooling Systems — High-capacity permanent branch connections on 1-1/2-inch chemical treatment feed lines and condenser water piping where a 1-inch all-slip branch supplies major bypass loops, primary treatment equipment connections, and high-flow secondary distribution lines as fixed all-solvent-weld junctions at defined tee locations in permanently routed mechanical room installations