Tee, Slip x Slip x FPT PVC Schedule 40 8" x 8" x 2" (402-578)

The 8" x 8" x 2" PVC Schedule 40 Tee (402-578) pairs solvent-weld slip connections on the 8" run ports with a 2" female pipe thread (FPT) branch outlet — combining the permanence of a large-diameter cemented main line with the installation flexibility of a small-bore threaded branch takeoff in a single fitting. This slip x slip x FPT configuration eliminates the need for a separate threaded adapter at the branch, consolidating the junction into one component and reducing both the installed fitting count and the number of potential leak points at this connection.

The contrast in size between the 8" slip run and the 2" FPT branch defines the specific role this tee plays in a piping system. Unlike a near-equal reducing branch configuration, the 8" to 2" differential positions this fitting primarily as a tap point — a means of accessing the main line flow for sampling, monitoring, chemical injection, pressure measurement, or small-bore secondary feeds without requiring a full-size branch tee or a downstream reducer assembly. The 2" FPT branch accepts any standard NPT-threaded male fitting, making it equally suited to ball valves, pressure gauges, flow meters, chemical injectors, or threaded nipple extensions depending on the application.

Manufactured from white PVC compound meeting ASTM D2466 dimensional standards, the 402-578 delivers the corrosion resistance, chemical inertness, and long-term durability that make Schedule 40 PVC the preferred material for large-bore water distribution, irrigation infrastructure, and industrial process piping. The Schedule 40 pressure rating is well matched to the low-to-medium pressure operating environments where 8" PVC mains are most commonly installed, and the threaded 2" branch provides a serviceable, removable connection point that can be isolated, capped, or reconfigured without disturbing the permanently bonded main line.

Specifications:

Apply PTFE tape or pipe thread sealant to male NPT threads before assembly on the 2" FPT branch. Do not overtighten threaded connections — hand-tight plus one to two turns is the standard assembly practice for PVC NPT joints. Heavy-bodied solvent cement is recommended for 8" slip socket joints. Allow full cure time before pressurizing. Pressure-temperature derating applies at elevated service temperatures per ASTM standards.

Industries & Applications:

• Municipal Water Distribution — 8" transmission and primary distribution mains requiring a 2" threaded tap for pressure monitoring ports, blow-off valves, air release valve connections, or small-bore service branch feeds where a removable threaded interface is preferred over a permanent cement joint
• Agricultural & Large-Scale Irrigation — 8" mainline trunk systems with a 2" threaded branch outlet for chemical injection points, fertigation inlet connections, pressure gauge taps, or small-bore bypass feeds on large farms, golf courses, and managed landscape installations
• Industrial Process Piping — High-volume fluid transfer headers requiring a 2" threaded branch for inline flow meters, pressure transducers, chemical dosing injection ports, or sample valves where the threaded interface allows future instrument replacement or reconfiguration without main line disruption
• Water & Wastewater Treatment — Plant distribution headers with 2" threaded branch connections for chemical feed inlets, grab sample taps, pressure monitoring instrumentation, or secondary process bleed-off points in treatment plant process piping
• Fire Protection Supply Systems — 8" underground or above-grade supply mains requiring a 2" threaded branch for test outlet connections, pressure gauge ports, or small-bore drain valve taps at strategic points along the supply main
• Industrial Cooling & HVAC Systems — 8" chilled water or condenser water distribution mains with a 2" threaded branch for chemical treatment injection, conductivity probe connections, bleed-off valves, or small-bore bypass feeds to monitoring equipment
• Stormwater & Flood Control Infrastructure — Large-diameter collection or conveyance systems requiring a 2" threaded branch tap for flow monitoring instrumentation, water quality sensors, or small-bore cleanout and access connections
• Aquaculture & Water Management — High-flow recirculation or intake headers requiring a 2" threaded branch tap for aeration injection, water quality monitoring probes, chemical treatment inlets, or small-bore flow control connections