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The 520657 serves as the central logic board of the EasyTouch 8 automation system
Flow Meter by Blue-White for 2-1/2" PVC Pipe Top Mount 60-240 GPM
allowing you to dial in the correct sanitizer output for your pool or spa
verify against Pentair's parts documentation or the number molded into the original cover to confirm 270030Z is the correct replacement for your installation
Pentair Tank Clamp Assembly | SM & SMBW 4000 Series D.E. Filter | 197020 Clarifiers & Enzymes The 520657 serves as theThe Pentair Tank Clamp Assembly (197020) is the OEM replacement metal clamp ring assembly for the SM and SMBW 4000 Series D. E. Filter. What It Does The tank clamp assembly secures the upper and lower tank halves of the SM and SMBW 4000 Series D. E. filter together under operating pressure. A failed or corroded clamp ring compromises the filter's pressure seal, resulting in leaks at the tank seam. Replacing this assembly restores the structural
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