Pentair 1.5" S x 2" SPG Clean & Clear Plus Valve Adapter Kit

The Pentair 1.5" Slip x 2" Spigot Valve Adapter Kit (part number 270100, which includes two 271096 unions) is a specialized external plumbing adaptation package engineered exclusively for pairing pool and spa filtration systems with multi-port backwash valves. This plumbing kit is standard hardware for connecting side-mount multi-port valves directly to the pre-spaced bulkhead ports of high-capacity filtration networks, most notably the Pentair Clean & Clear Plus cartridge series (CCP320, CCP420, CCP520) and Pentair FNS Plus Diatomaceous Earth (D.E.) filters.

Injection-molded from thick-walled, high-impact, and chemically inert black ABS thermoplastic polymer, each adapter fitting features a precise dual-size connection geometry. The interior profile is engineered as a 1.5-inch straight Slip (S) socket designed to solvent-weld directly over 1.5-inch rigid PVC plumbing or valve ports, while the exterior profile scales up to a 2-inch Spigot (SPG) diameter, allowing it to function as a male pipe end that fits cleanly into standard 2-inch pool plumbing unions or bulkhead nuts. Its primary operational role is to establish an absolute watertight and airtight transition zone that allows smooth, unrestricted water flow between the filter vessel and the valve matrix. By incorporating a quick-disconnect union nut mechanism over its integrated sealing ring seats, it provides pool technicians with an accessible mechanical joint that allows the valve or filter tank to be uncoupled for seasonal servicing without sawing through the equipment pad infrastructure.

This robust configuration ensures the external plumbing connections can easily manage high fluid distribution velocities and safely sustain continuous system operating pressures up to 50 PSI without weeping, experiencing localized thread stress, or shifting out of alignment under intense pump vibration surges. Engineered to endure decades of demanding outdoor equipment pad weathering, direct UV exposure, and shifting thermal expansion stresses, its rugged ABS framework completely resists material softening, structural cracking, and corrosive breakdown from exposure to pool sanitizers like chlorine, bromine, and winterizing chemical flushes. Due to its rigid, thick-walled plastic structural profile and dual-diameter geometry, this complete replacement adapter kit carries a net product and shipping weight of approximately 0.65 to 0.85 pounds (about 10.4 to 13.6 ounces).