One end had threads (usually for connecting a 1 1/2 inch threaded end hose)
The other end compresses onto a fitting by twisting the grey adjustment ring, thereby squeezing down to make an air tight seal on the fitting
ONE (1) Adapter B new updated Style
The Type B Hose Adapter converts INTEX pools with 1.25" fittings to 1.5" fittings. These hose adapters will be needed when upgrading from a low flow pump system (1000 GPH or smaller) to a larger pump system (1500 GPH or larger). Includes one hose adapter. Please note, if you are upgrading and not replacing just one, two adapters are needed for your system.