The Bestway® Hose Adapters are a simple and effective way to attach your filter pump to your above ground pool. This allows more powerful filters to be used with pools of all sizes, improving the flow of clean water. Two hose adapters are included to fit onto the inlet and outlet hose. These durable, corrosion-resistant adapters connect hoses (diameter: 38 mm / 1.5") to pool valves (diameter: 32 mm / 1.25").