Filtration performance boost By securely sealing pump openings, these plugs maintain water pressure in your filtration system. This helps improve overall filtering effectiveness, resulting in cleaner, clearer pool water for your swimming enjoyment. durable material Made from rustproof plastic, these strainer hole plugs withstand constant water exposure and chemical treatments. Their sturdy construction guarantees longterm performance without degradation, even in harsh pool environments. Wide compatibility Designed to fit multiple pool pump models including 28270, 28271, 28272, 28273, 26700, and 26702. This versatile plug works with pumps up to 530/1000 gph capacity. Its universal 1.25 inch diameter makes it suitable for most standard pool filtration systems without plunger valves. leak protection Engineered for a precise, airtight seal that effectively prevents water leakage during filter maintenance. The tight fit helps keep pool water clean and ensures the filtration system operates at peak efficiency with minimal water waste. Use scenarios Routine filter maintenance on compatible pumps: install the plug to maintain pressure and prevent leaks while servicing the filtration system. Seasonal or storage periods: seal pump openings during winterizing or offseason maintenance to minimize water loss and protect components. Standard residential filtration setups: ideal for most systems lacking plunger valves, thanks to the universal 1.25 inch diameter and broad compatibility.