These 2 Intex Adapters B are ideal choices for connecting a heavier pump to a small pool. These adapters allow you to connect a 38 mm Intex hose with swivel coupling to a small pool with a 32 mm connection. They are also required when upgrading an Intex 2.006 L/h (530 gal/h) or 3.785 L/h (1.000 gal/h) filter pump to an Intex 5.678 L/h (1.500 gal/h) or larger system. Additionally, these adapters are specifically designed for use with the Intex pool process.