Pentair SM/SMBW 4000 Series Tank Clamp Assembly

The Pentair SM/SMBW 4000 Series Tank Clamp Assembly (Part #197020) is a heavy-duty metal tensioning ring designed to securely lock the upper lid and lower tank body together on Pentair Purex SM and SMBW 4000 Series Diatomaceous Earth (D.E.) pool filters. Engineered to withstand the rigorous internal demands of a pressurized filtration system, this clamp provides a uniform, leak-proof seal capable of safely containing operational pressures up to 50 psi. The robust assembly features a metal band integrated with a mechanical T-bolt and a durable clamping knob, which allows pool operators to manually tension or remove the hardware during routine filter maintenance, internal grid cleanings, or element replacements. By maintaining structural integrity at the tank seam, it acts as a primary safety component that prevents dangerous high-pressure lid separations while the pool pump is running.