Tee, Slip x Slip x Fpt PVC Schedule 80 6" x 4" (802-532)

The 6" x 4" PVC Schedule 80 Tee (Slip x Slip x FPT), Part #802-532, is a heavy-wall reducing tee fitting that combines a 6-inch solvent weld run with a 4-inch female pipe threaded (FPT) branch outlet — a configuration specifically engineered for systems where a large-diameter mainline must deliver a removable, threaded branch connection to a valve, instrument, service line, or equipment port without disrupting the primary solvent-welded run. Manufactured from Type I, Grade I PVC compound to ASTM D2467 specifications, this fitting delivers Schedule 80's elevated pressure rating, increased wall thickness, and broad chemical resistance across industrial process, chemical handling, and municipal infrastructure applications.

The mixed connection configuration — slip x slip on the run, FPT on the branch — is the defining functional characteristic of this fitting and the primary reason it is specified over a standard all-slip or all-threaded reducing tee. The solvent weld run ports provide a permanent, structurally integral bond with the 6-inch mainline pipe on both sides of the tee body, ensuring the primary flow path is sealed and mechanically sound for the life of the system. The 4-inch FPT branch, by contrast, accepts any male-threaded (MPT) fitting, valve, plug, cap, or adapter — creating a branch connection point that can be assembled, disassembled, reconfigured, or capped without disturbing the solvent-welded mainline. This combination makes Part #802-532 a highly practical fitting for systems requiring permanent mainline integrity alongside serviceable, accessible branch connections.

The 4-inch FPT branch size at a 6-inch run represents a two-nominal-size reduction — a meaningful step-down that positions this tee for applications where a mid-size threaded branch must be tapped off a larger-diameter primary main. At this size combination, the FPT branch is large enough to accommodate substantial flow for service connections, bypass lines, sampling ports, chemical injection points, and valve assemblies, while the 6-inch solvent weld run handles the full mainline volume without restriction through the tee body.

In Schedule 80, the FPT branch threads are cut into thicker PVC wall stock than Schedule 40 equivalents — providing more thread engagement depth, greater resistance to thread pullout under pressure, and improved performance in applications where the threaded branch connection is frequently assembled and disassembled for service access or seasonal system changes. This makes Part #802-532 the preferred specification over a Schedule 40 equivalent wherever the branch connection must withstand repeated make-and-break cycles or where system pressure, temperature, or chemical exposure demands the added wall thickness that Schedule 80 provides.

Specifications:

Note: Pressure ratings decrease with elevated temperatures and are further reduced at the branch junction under dynamic flow conditions. Threaded PVC connections should be assembled with PTFE thread tape or an appropriate PVC-compatible thread sealant — do not use pipe dope compounds that contain petroleum distillates or solvents incompatible with PVC. Do not overtighten threaded connections; hand-tight plus one to two turns with a strap wrench is the recommended assembly practice for PVC FPT fittings. Consult ASTM D2467 derating curves and applicable engineering specifications before installation in high-pressure or elevated-temperature service.

Industries & Applications:

• Industrial Process Piping — Permanent solvent-welded mainline installations in chemical plants, refineries, and manufacturing facilities where a serviceable 4-inch threaded branch is required for valve assemblies, bypass connections, chemical injection points, or instrument isolation valves that must be accessible for maintenance without cutting into the solvent-welded run.
• Chemical Handling & Water Treatment — Branch tee connections in treatment plant distribution headers, chemical feed systems, and process piping where PVC's resistance to acids, caustics, and chlorinated media is a primary material driver, Schedule 80 wall thickness is required by specification, and the FPT branch provides a removable connection point for dosing valves, sampling ports, or chemical metering equipment.
• Municipal Water Distribution — Service connections, valve branch taps, and metering assembly feeds on 6-inch distribution mains where a threaded 4-inch branch provides a removable, serviceable connection to a gate valve, ball valve, or meter assembly without requiring a solvent weld at the branch joint — simplifying future valve replacement or service access.
• Industrial Valve Manifolds — Tee fittings in valve manifold assemblies where the solvent-welded run maintains permanent mainline connection integrity and the FPT branch provides a threaded port for ball valves, gate valves, pressure gauges, pressure relief valves, or isolation valve assemblies that require periodic removal or replacement.
• Sampling & Instrumentation Connections — Branch taps for pressure gauges, flow meters, sampling valves, and process analyzers on 6-inch process or utility mains, where the 4-inch FPT branch accepts a threaded instrument isolation valve or sampling port assembly and the solvent-welded run ensures mainline integrity between service intervals.
• Irrigation & Agricultural Systems — Control valve assemblies, filter station branch connections, and fertigation injection points on high-pressure 6-inch irrigation mainlines where threaded branch valves, fertilizer injectors, or pressure regulation equipment must be periodically removed for maintenance, winterization, or seasonal system reconfiguration.
• Pump Station Piping — Discharge header branch connections at pump stations where the FPT branch accepts threaded pressure gauges, relief valves, or bypass valve assemblies while the slip run maintains permanent solvent-welded connection to the primary discharge main under Schedule 80 specification.
• HVAC & Mechanical Systems — Branch connections on chilled water mains, condenser water loops, and cooling tower piping in large commercial and industrial facilities where 6-inch distribution headers require a serviceable 4-inch threaded branch for isolation valves, drain connections, or chemical treatment access points.
• Power Generation & Heavy Industrial — Service water, cooling water, and chemical feed branch connections at process headers in power plants and heavy process facilities where Schedule 80 is the facility baseline specification and the FPT branch provides a removable threaded port for instrumentation, chemical injection, or periodic service valve access.