Pentair Insert Top Cap | 278021 category_venting-systems The NEFB36H-BS-1 is designed to

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Pentair Insert Top Cap | 278021 category_venting-systems The NEFB36H-BS-1 is designed toWhat This Part Is Used For Pentair 278021 Insert Top Cap is a replacement cap used in compatible Pentair assemblies. It helps secure and close the top portion of the designated component. Why This Part Matters A cracked or loose top cap can allow air intrusion or water leakage. Replacing it restores proper sealing and structural integrity. This prevents recurring issues during normal system operation. Key Features and Specifications Manufacturer part