Tee, Slip x Slip x FPT 10" x 10" x 1-1/2" (C602-621)

The 10" x 10" x 1-1/2" PVC Schedule 40 Slip x Slip x FPT Tee (Part No. C602-621) is a large-diameter, three-port branch fitting that maintains a full 10-inch solvent-weld mainline run while introducing a 1-1/2-inch female pipe thread (FPT) branch outlet — combining the permanence and structural integrity of a solvent-welded main run with the direct, hardware-free compatibility 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 1-1/2-inch FPT branch accepts any standard 1-1/2-inch male pipe thread (MPT) fitting, valve, instrument, or threaded device directly — no solvent welding, no transition adapters, and no intermediate hardware required at the branch point.

The 1-1/2-inch FPT branch is the smallest outlet in the C602 series for 10-inch mainline runs — and that designation carries precise application meaning. With a cross-sectional area reduction of approximately 44:1 from the 10-inch mainline bore to the 1-1/2-inch branch opening, this fitting is not a zone supply branch, a service lateral, or a flow-splitting device. It is a purpose-built instrument and device access point — a tee body engineered to provide a standard threaded interface for pressure gauges, compound gauges, water quality probes, chemical injection quills, small-capacity air release valves, sample taps, thermowells, and other monitoring and control devices whose 1-1/2-inch NPT male connection is the standard factory interface for that class of equipment. The branch flow through a 1-1/2-inch outlet on a 10-inch main is inherently incidental to the primary flow — the value of this fitting is the device connection it provides, not the branch flow capacity it delivers.

The 1-1/2-inch NPT connection is one of the most widely used standard thread sizes across industrial instrumentation and process control equipment. Pressure transmitters, differential pressure gauges, compound vacuum-pressure gauges, thermowells, chemical injection check valves, small combination air release valves, and a broad range of water quality monitoring instruments — turbidity sensors, pH probes, conductivity monitors, dissolved oxygen meters — are routinely manufactured with 1-1/2-inch NPT male process connections as their standard inlet configuration. The C602-621 provides the tee body that interfaces these devices directly to a 10-inch PVC mainline without a separate tee-plus-adapter assembly, keeping the branch stack compact, minimizing thread joints in the branch riser, and establishing a clean, code-compliant connection between the mainline and the instrument or device.

The distinction between this fitting and the larger FPT branch sizes in the C602 series is fundamentally a device-matching decision. Where the 2-inch (C602-622), 3-inch (C602-623), and 4-inch (C602-624) FPT variants serve progressively higher-flow branch applications — from small blow-offs and air releases at 2 inches to zone supply and service connections at 4 inches — the 1-1/2-inch variant is specified when the branch device has a 1-1/2-inch NPT male inlet and the correct application is to match the tee body to that device connection without a reducing threaded bushing in the branch assembly. Eliminating that bushing reduces the joint count in the branch riser, removes a potential leak point at a threaded connection that will be cycled during device installation and replacement, and keeps the branch profile as compact as the device installation geometry allows.

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 1-1/2-inch FPT branch at 10-inch run size is the most specialized configuration in the C602 family — a fitting that many local distributors do not stock at all — making a reliable online source with confirmed availability a significant procurement advantage for engineers and contractors working to schedule on large-diameter system installations where instrument connection details are specified at the design stage.

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. The approximately 44:1 cross-sectional area reduction from the 10-inch run to the 1-1/2-inch branch is characteristic of an instrument or device connection — confirm branch device compatibility and process connection requirements with the device manufacturer before installation.

Industries & Applications:

• Municipal Water Distribution — Installs on 10-inch transmission and distribution mains to provide a 1-1/2-inch threaded branch connection for pressure transmitters, compound gauges, small combination air release valves, water quality probes, or blow-off assemblies whose standard process connection is 1-1/2-inch NPT male — directly on the mainline tee body without an additional reducing adapter in the branch riser
• Instrumentation & Process Control Connections — The primary application driver for the 1-1/2-inch FPT branch size; pressure transmitters, differential pressure gauges, thermowells, flow conditioning instruments, and a broad range of inline monitoring devices are manufactured with 1-1/2-inch NPT male process connections as their standard inlet; the C602-621 provides the tee body for direct installation of these devices on a 10-inch PVC main without an intermediate adapter fitting
• Air Release & Vacuum Break Assemblies — Small-capacity combination air release and vacuum break valves specified for 10-inch transmission mains are available with 1-1/2-inch NPT male inlets; the C602-621 tee body provides the mainline connection for these assemblies directly, keeping the air release riser assembly compact and eliminating the reducing bushing that would be required at a larger FPT branch outlet
• Chemical Dosing & Injection Systems — The 1-1/2-inch FPT branch accepts standard threaded chemical injection check valves, quill assemblies, and metering connections at the smaller end of the injection device size range common to large-diameter water and process mains; the threaded connection allows injection assemblies to be removed, inspected, cleaned, or replaced without cutting into the mainline; always verify chemical compatibility before specification
• Industrial Process Piping — Introduces a 1-1/2-inch threaded instrument tap, sample valve, pressure relief connection, or drain point off a 10-inch process supply header in chemical, pharmaceutical, manufacturing, and power generation facilities where 1-1/2-inch NPT is the standard process connection for the branch device and threaded replaceability is a maintenance design requirement
• Pump Station & Mechanical Room Piping — Used on 10-inch pump discharge or suction headers to provide a 1-1/2-inch threaded branch for pressure gauges, compound gauges, pressure transmitters, or small-diameter bypass and drain connections that are mounted directly on the mainline fitting and must be accessible for routine calibration, replacement, or maintenance without disturbing the solvent-welded run on either side
• Water Treatment & Filtration Plants — Integrates into 10-inch process piping headers and distribution manifolds where a 1-1/2-inch threaded branch is required for water quality instrumentation — turbidity sensors, pH probes, conductivity meters, dissolved oxygen monitors — whose standard process connection is 1-1/2-inch NPT male, providing a direct inline mounting point without a separate tee-and-adapter combination in the instrument installation
• Commercial & Agricultural Irrigation — Provides a 1-1/2-inch threaded branch on a 10-inch irrigation mainline for pressure gauges, fertigation injection assemblies, small-capacity flow control valves, or water quality monitoring connections that require removability for seasonal maintenance, system adjustment, or equipment replacement without cutting the mainline or disturbing adjacent solvent-weld joints