CMP | 25552-020-300 | 1.5" MPT White Solid Flange Cap Pool Plug | Eyeball Fitting Plug

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This solid flange cap pool plug is a replacement sealing component designed for compatible eyeball return fittings and threaded pool wall fittings. The 1.5" MPT connection supports threaded installation, while the solid flange cap design helps close off the fitting opening during service, winterizing, or temporary line isolation. Built for pool maintenance, seasonal closing, and repair applications, this white plug is commonly used when an eyeball fitting needs to be capped or sealed in a compatible return assembly. ━━━━━━━━━━━━━━━━━━ Key Features • Replacement solid flange cap pool plug for compatible eyeball return fittings • 1.5" MPT connection for matching threaded pool wall fitting applications • White finish provides a clean appearance in compatible pool interiors • Used to seal or cap compatible return fittings during service or winterizing • Helps close off a fitting opening for temporary line isolation or maintenance work • Suitable for pool return fittings, inlet fittings, and compatible threaded wall fittings • Replacement component for worn, cracked, missing, or damaged fitting plugs • Proper fitment and sealing should be verified before use in any pool plumbing application ━━━━━━━━━━━━━━━━━━ Product Overview This flange cap pool plug is used to seal compatible threaded pool return or eyeball fitting openings. It installs into a 1.5" MPT-compatible fitting and helps close off the return point when the line needs to be isolated, serviced, or prepared for seasonal pool closing. The plug is commonly used during winterizing, return fitting maintenance, pressure testing, or temporary plumbing closure. It can also be useful when an eyeball fitting assembly is being serviced and the opening needs to be capped as part of the maintenance process. During installation, the fitting threads, sealing surface, plug body, and surrounding wall fitting should be inspected for debris, cracks, wear, or damage. The plug should be installed securely without over-tightening, which could damage the threads, flange, or fitting body. Routine maintenance should include checking the plug for cracks, warping, thread wear, chemical deterioration, or sealing issues before reuse. Keeping the plug in good condition helps support reliable fitting closure, protects pool plumbing during service, and reduces the risk of leaks in compatible applications. Show more