Pentair Filter Compression Ring Kit

The Pentair Filter Tension Control/Compression Clamp Ring Kit (part number 190003) is a critical high-pressure structural containment fastener engineered exclusively to seal the split-tank chassis halves of Pentair’s flagship vertical pool and spa filtration vessels. This genuine original equipment manufacturer (OEM) structural reinforcement kit is standard hardware tailored specifically for the wide-diameter perimeter mating tracks of the Pentair FNS Plus Diatomaceous Earth (D.E.) filter series (models FNSP24, FNSP36, FNSP48, and FNSP60), the Clean & Clear® Plus multi-cartridge filtration line (models CCP240, CCP320, CCP420, and CCP520), and the Quad D.E.® filter family.

Fabricated from commercial-grade, high-tensile stainless steel finished with a protective weatherproofing layer, this heavy-duty circumferential band measures approximately 23-1/4 inches in length by 22-1/4 inches in width to seamlessly span the central union of the tank structure. Rather than relying on rigid manual tightening guesswork, this kit is packaged with Pentair's signature Tension Control™ spring mechanism—which includes a heavy mechanical coil spring, a friction washer, and a specialized long-shank brass barrel nut. Its primary operational role is to establish an absolute, unyielding watertight and airtight compression boundary. When positioned around the tank lip over the body O-ring (part number 39010200) and tightened using a standard deep socket wrench, the internal coil spring compresses until its metal coils touch completely flat. This design acts as a built-in visual torque gauge, providing the exact optimal axial clamping force required without the need for a separate torque wrench.

This precise structural tension forces the upper filter lid and lower tank basin together evenly, eliminating localized gaps or pressure stress concentrations. By establishing this unified perimeter hold, the clamp safely contains the immense hydraulic thrusts generated during high-velocity pump turnover cycles, allowing the filter to continuously handle massive circulation volumes and sustain continuous internal operating metrics up to 50 PSI without weeping, flexing at the seams, or risking structural separation. Built to endure decades of demanding outdoor equipment pad weathering, pooling ground moisture, and direct seasonal temperature shifts, its solid stainless steel configuration completely resists metal fatigue, stretching, and advanced oxidation from close proximity to chemical vapors like chlorine and bromine. Due to its thick-gauge metal banding, heavy-duty internal tracking guides, and solid steel mechanical spring-nut components, this complete replacement filter compression clamp kit carries a net product and shipping weight of approximately 9.00 pounds.