Pentair Manual Air Relief Valve, 2-3/8", for NS/FNS Filter | 261003 Rectangular Fire & Water Bowl Provides necessary parts to replace

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Pentair Manual Air Relief Valve, 2-3/8", for NS/FNS Filter | 261003 Rectangular Fire & Water Bowl Provides necessary parts to replaceWhat This Part Is Used For Pentair 261003 Manual Air Relief Valve 2 3 8in, NS FNS is a replacement air relief valve for compatible Pentair Nautilus and FNS filter models. It allows manual release of trapped air from the filter tank. Why This Part Matters Trapped air can cause pressure fluctuations and inefficient filtration. A functioning air relief valve restores proper priming and pressure balance. Replacing a leaking or stuck valve prevents filter