Tee, Slip x Slip x Slip 12" x 12" x 2" (C601-662)

The 12" x 12" x 2" PVC Schedule 40 Slip x Slip x Slip Reducing Tee (Part No. C601-662) is a large-diameter, three-port branch fitting that maintains a full 12-inch solvent-weld mainline run while introducing a 2-inch reduced branch outlet at a 90-degree angle — all three ports permanently solvent-welded, all three connections integral to a single fitting body engineered to the dimensional and performance standards of Schedule 40 PVC. The two run ports are slip (socket) end accepting 12-inch PVC pipe or spigot fittings, while the 2-inch branch socket accepts 2-inch PVC pipe or a spigot fitting — both via solvent-weld connection for a permanent, pressure-rated joint that becomes a fixed structural element of the piping system upon curing.

The 6:1 cross-sectional area reduction from the 12-inch mainline to the 2-inch branch outlet is the largest reduction ratio in the C601 reducing tee family for 12-inch runs — and that magnitude is not incidental. It defines with precision the application class this fitting serves. A 2-inch branch on a 12-inch mainline is not a zone supply connection, a service lateral, or a flow-splitting branch. It is the smallest practical permanent pipe connection that can be made directly off a 12-inch mainline fitting body — a branch whose purpose is to provide a fixed, solvent-welded interface for drain assemblies, blow-off risers, air release connections, chemical injection feed lines, small-diameter recirculation loops, pressure monitoring stubs, and similar controlled-access or service connections where the 2-inch pipe size is the standard downstream dimension and the permanence of a solvent-weld joint is the design requirement.

The contrast between the C601-662 and the C601-663 (12" x 12" x 3" branch) is a distinction that matters at the specification stage. The 3-inch branch serves slightly higher-flow service connections and blow-off assemblies where the larger branch diameter is specified for flush volume, drain rate, or downstream pipe size compatibility. The 2-inch branch of the C601-662 serves the smallest-diameter permanent branch connections on a 12-inch mainline — applications where 2-inch is the standard pipe size for the branch assembly, the drain riser, the air release connection, or the chemical feed line, and where using a 3-inch branch with a downstream reducer would add an unnecessary fitting joint to a branch assembly that is already working at a flow rate well within 2-inch pipe capacity. Specifying the correct branch size at the tee body eliminates that downstream reducer, keeps the branch assembly compact and the joint count minimal, and reduces the number of potential leak points in a high-consequence large-diameter system.

The C601-662 is equally distinguished from the FPT branch variants in the C602 series by its all-slip branch connection. The C602 series — including the 10-inch FPT tees described elsewhere in Maxx-Supply's catalog — provides threaded branch outlets for removable and replaceable device connections: valves, gauges, air release valves, and instrumentation that must be cycled or replaced during the operational life of the system. The C601-662 provides a permanent solvent-welded 2-inch branch for piping connections that are built into the system as fixed infrastructure — drain lines, blow-off pipe risers, recirculation stubs, and branch feed lines where the branch pipe is a permanent part of the system rather than a removable device interface. For 12-inch mainline applications requiring a removable 2-inch branch device connection, the appropriate specification is a 12-inch tee with a 2-inch FPT branch and a male-threaded device at the branch outlet — but where a permanent solvent-weld 2-inch branch is the design intent, the C601-662 is the direct, single-piece solution.

This Charlotte Pipe SKU — identified by the C601 part number prefix — is a nationally distributed, contractor-recognized fitting supporting consistent availability across supply chains serving municipal water utilities, industrial contractors, and large-scale irrigation installers. The 12" x 12" x 2" reducing tee configuration is among the most narrowly stocked specialty fitting sizes in the large-diameter PVC category — a fitting that many local distributors do not carry at all — making a reliable online source with confirmed availability a significant procurement advantage for contractors and project managers working to schedule on large-diameter system installations where this exact branch size is called out in the design drawings.

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. The 6:1 cross-sectional area reduction from the 12-inch run to the 2-inch branch produces a very substantial increase in branch flow velocity — confirm branch hydraulic requirements and downstream component sizing with a qualified engineer before system design and commissioning.

Industries & Applications:

• Municipal Water Distribution — Installs on 12-inch transmission and distribution mains to provide a permanent 2-inch solvent-welded branch connection for blow-off assemblies, small-diameter drain risers, pressure monitoring stubs, or permanent service connections where a fixed 2-inch pipe branch — rather than a threaded device interface — is the design intent at the branch point on the mainline
• Blow-Off & System Drain Assemblies — One of the most common applications for a 2-inch branch on a 12-inch main; blow-off assemblies on large-diameter transmission mains are frequently designed with a 2-inch branch riser leading to a valve and outlet, and the permanent solvent-weld branch of the C601-662 provides the mainline tee body for these assemblies where the blow-off piping is installed as a fixed part of the system at initial construction
• Air Release & Vacuum Break Assemblies — Large-diameter transmission mains require air release and vacuum break installations at high points in the piping profile; 2-inch is a standard branch riser size for many of these assemblies, and where the riser piping is permanently solvent-welded into the system rather than threaded, the C601-662 provides the mainline branch fitting for this connection in a single fitting body without a separate tee-and-reducer combination
• Industrial Process Piping — Introduces a permanent 2-inch branch off a 12-inch process supply header for recirculation stubs, equipment drain connections, chemical feed inlets, or small-diameter sub-process branches in chemical, pharmaceutical, manufacturing, and power generation facilities where the branch piping is a permanent structural element of the process system built in during initial installation
• Chemical Dosing & Feed Line Connections — Where a 12-inch process or water main must receive a permanent 2-inch chemical feed line connection — for chlorination, pH adjustment, corrosion inhibitor dosing, or other treatment chemical injection where the feed line is hard-piped into the system — the C601-662 provides the mainline tee body for that connection without a separate tee-and-reducer assembly; always verify chemical compatibility with the specific fluid and concentration before specification
• Pump Station & Mechanical Room Piping — Used on 12-inch pump discharge or suction headers to introduce a permanent 2-inch branch for recirculation lines, bypass stubs, drain connections, or small-diameter service runs that are solvent-welded into the station piping as fixed system components not intended for removal or replacement during normal operations
• Water Treatment & Filtration Plants — Integrates into 12-inch process piping headers and treatment train distribution mains where a permanent 2-inch branch is required for chemical feed inlets, process drain stubs, recirculation connections, or small-diameter distribution branches that are built into the plant piping as fixed infrastructure during original construction or planned capacity expansion
• Commercial & Agricultural Irrigation — Provides a permanent 2-inch branch connection on a 12-inch irrigation mainline for drain assemblies, chemical injection feed lines, small-diameter zone supply stubs, or pressure relief branches that are solvent-welded into the irrigation system as permanent components of the distribution infrastructure during system installation