Tee, Slip x Slip x FPT 10" x 10" x 4" (C602-624)

The 10" x 10" x 4" PVC Schedule 40 Slip x Slip x FPT Tee (Part No. C602-624) is a large-diameter, three-port branch fitting that maintains a full 10-inch solvent-weld mainline run while introducing a 4-inch female pipe thread (FPT) branch outlet — combining the permanence and structural integrity of a solvent-weld main run with the installation flexibility and removability of a threaded branch connection in a single fitting body. The two run ports are slip (socket) configuration, accepting 10-inch PVC pipe or spigot fittings via solvent-weld connection, while the 4-inch FPT branch accepts any standard male pipe thread (MPT) fitting, valve, instrument, or threaded pipe section directly — no solvent welding required at the branch.

The defining feature of this fitting — and the reason it is specified over a standard all-slip tee — is the threaded branch outlet. In the vast majority of large-diameter PVC piping systems, the mainline run is a permanent, solvent-welded structure that is not intended to be disassembled. The branch connection, however, frequently needs to accommodate components that are removable, serviceable, or field-adjustable — threaded valves, pressure gauges, flow meters, chemical injection assemblies, air release valves, blow-off assemblies, or any instrument or device that is installed, removed, or replaced during the operational life of the system. A FPT branch outlet serves all of these applications directly, accepting the male-threaded connection of any compatible component without requiring an additional threaded adapter fitting between the tee body and the branch device.

The 4-inch FPT branch on a 10-inch mainline run is a pairing with clear application logic — the 10-inch run carries the primary high-volume flow of a transmission main, header, or supply system, while the 4-inch threaded branch accommodates a service connection, valve assembly, or instrument that operates at a flow rate and pressure appropriate to the 4-inch size. The step-down from the mainline to the branch is handled entirely within the tee body, eliminating the need for a separate reducing tee or a threaded adapter bushing downstream of a full-bore branch outlet. This simplification reduces fitting count, shortens the branch assembly, and keeps the overall layout compact — a meaningful advantage in pump stations, valve vaults, and mechanical rooms where branch assemblies often compete for space with adjacent piping and equipment.

This Charlotte Pipe SKU — identified by the C602 part number prefix — is a nationally distributed, contractor-recognized fitting that supports consistent availability across supply chains serving municipal water utilities, industrial contractors, and large-scale irrigation installers. The mixed connection type (slip run, threaded branch) is a specialty configuration that is less commonly stocked than all-slip or all-threaded alternatives, making availability from a reliable distributor a meaningful procurement consideration for contractors working to schedule on large-diameter system installations.

Manufactured from virgin PVC compound to ASTM D2466 standards, this tee delivers the corrosion resistance, chemical compatibility, and long-term service life that make Schedule 40 PVC the standard material across water, wastewater, irrigation, and industrial piping environments. NSF/ANSI 61 certification confirms suitability for potable water contact, extending its application range to municipal water distribution, water treatment infrastructure, and food-adjacent process piping in addition to its broad industrial and agricultural markets.

Specifications:

Note: Pressure ratings decrease with increasing pipe diameter. Always apply appropriate thread sealant (PTFE tape or pipe dope rated for PVC) to the male threads before assembly on the FPT branch port. Do not over-torque threaded connections on PVC — hand-tight plus 1–2 turns with a strap wrench is the recommended installation practice to avoid cracking the female thread socket.

Industries & Applications:

• Municipal Water Distribution — Installs on 10-inch transmission and distribution mains to provide a 4-inch threaded branch connection for blow-off assemblies, air and vacuum release valves, pressure sensing ports, or meter connections that require a removable, serviceable threaded interface on the mainline run
• Pump Station & Mechanical Room Piping — The mixed slip-run, threaded-branch configuration is particularly well-suited to pump station discharge headers and mechanical room manifolds where the mainline is permanently solvent-welded and the branch must accommodate threaded valves, pressure gauges, or instrumentation that will be serviced or replaced during the operational life of the system
• Industrial Process Piping — Introduces a 4-inch threaded branch connection off a 10-inch process supply header for chemical injection assemblies, sampling valves, pressure relief connections, or instrumentation taps in chemical, pharmaceutical, manufacturing, and power generation facilities where threaded branch connections are preferred for their removability and field serviceability
• Chemical Dosing & Injection Systems — The FPT branch outlet accepts threaded chemical injection quills, dosing valve assemblies, and metering connections directly — eliminating the adapter fitting that would be required between an all-slip tee and a threaded injection device; always verify chemical compatibility with the specific fluid and concentration before specification
• Commercial & Agricultural Irrigation — Provides a 4-inch threaded branch connection on a 10-inch irrigation mainline for threaded valve bodies, zone control assemblies, fertigation injection points, or pressure regulation equipment that must be removable for seasonal maintenance, adjustment, or replacement
• Water Treatment & Filtration Plants — Integrates into 10-inch process piping headers and distribution manifolds where a 4-inch threaded branch connection is required for instrumentation, sample taps, chemical feed inlets, or removable process connections in treatment train piping that must accommodate periodic equipment replacement or calibration access
• Fire Suppression Yard Mains & Support Piping — Used in large-diameter yard main configurations where a 4-inch threaded branch connection is required for hydrant risers, standpipe connections, or test drain assemblies; always verify with a licensed fire protection engineer and local code authority before specification
• Aquaculture & Recirculating Systems — Provides a threaded branch connection on 10-inch RAS distribution headers for removable flow control valves, monitoring equipment, or tank isolation assemblies that require periodic maintenance access without disturbing the solvent-welded mainline run