Reducer Bushing, Slip X Slip 12" X 6" (C637-666)

The 12" x 6" PVC Schedule 40 Slip x Slip Reducer Bushing (Part No. C637-666) provides a direct, large-diameter inline reduction from 12 inches to 6 inches in a single compact fitting — eliminating the need for additional transition pieces, reducing joint count, and keeping large-diameter piping systems structurally clean and hydraulically efficient. The spigot (male slip) end inserts directly into a standard 12-inch socket fitting, while the socket (female slip) end accepts a 6-inch PVC pipe or spigot fitting via solvent-weld connection — delivering a permanent, pressure-rated joint on both ends using standard PVC cement and primer.

The 2:1 diameter reduction ratio of this bushing places it in a frequently specified range — large enough that the flow transition between pipe sizes is a meaningful hydraulic consideration, yet common enough across municipal, industrial, and irrigation system designs that this size pairing appears regularly in engineering drawings and procurement specifications. Where a reducing tee or wye handles a branch-point reduction, the reducer bushing handles the inline reduction — seating inside an existing socket fitting to step the downstream pipe size down without adding length, elbow geometry, or additional fittings to the run.

This fitting is particularly valuable in manifold assemblies, pump station headers, and distribution system transitions where a 12-inch transmission or supply main must feed a 6-inch distribution or zone line — and where the bushing's direct socket-to-socket installation keeps the transition point compact and the overall system layout tight. In retrofit and repair scenarios, the slip x slip bushing also provides a straightforward path to reducing an existing 12-inch socket to accept 6-inch downstream pipe without modifying the surrounding fitting infrastructure.

Manufactured from virgin PVC compound to ASTM D2466 standards, this bushing 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 facilities, and food-adjacent process piping in addition to its broad industrial and agricultural markets. The Charlotte Pipe part number C637-666 reflects a well-stocked, nationally distributed SKU that supports consistent availability across contractor and distributor supply chains.

Specifications:

Note: Pressure ratings decrease with increasing pipe diameter. Consult manufacturer-published pressure-temperature rating tables and engineering specifications for full system design at operating conditions.

Industries & Applications:

• Municipal Water Distribution — Transitions large-diameter 12-inch transmission mains to 6-inch distribution laterals, service branches, or zone supply lines at system junctions, meter vaults, and distribution network tie-in points
• Industrial Process Piping — Steps down 12-inch supply headers to 6-inch sub-process lines, equipment feed connections, or parallel circuit inlets in chemical, pharmaceutical, manufacturing, and power generation facilities where a compact inline reduction is preferred over a multi-fitting transition
• Pump Station & Mechanical Room Piping — Reduces pump discharge or suction headers from 12-inch to 6-inch downstream connections in tight equipment room layouts where minimizing the fitting footprint and joint count is a design priority
• Commercial & Agricultural Irrigation — Connects 6-inch zone mains or lateral supply runs off a 12-inch irrigation header at field manifolds, zone control stations, or distribution transition points in large-scale commercial, turf, golf course, and agricultural irrigation systems
• Water Treatment & Filtration Plants — Integrates into large-diameter process piping headers and distribution manifolds where a 12-inch supply main must transition to a 6-inch downstream process connection, treatment train feed, or chemical distribution line
• Wastewater & Stormwater Infrastructure — Used in large-diameter collection and conveyance systems to reduce a 12-inch main to a 6-inch outlet, diversion branch, or secondary conveyance line in low-pressure or gravity-flow configurations
• Aquaculture & Recirculating Systems — Provides inline flow reduction in high-volume RAS distribution networks where a 12-inch supply header transitions to 6-inch tank distribution or zone supply runs across large recirculating facility layouts
• Mining & Heavy Industrial Water Supply — Delivers a reliable, compact inline diameter reduction in large-diameter site water distribution infrastructure serving process water supply, dust suppression, or equipment cooling circuits where multi-fitting transitions would add unacceptable complexity to the layout