Employ more than one propane tank at once and have clean-burning fuel for a long time. In most applications, the Stay-A-While brass tee is used to connect to an existing bulk cylinder and the included 5-ft. hose securely attaches to the tee and a second bulk cylinder. Now, two gas sources are running from the tee for a long-lasting fuel source to your gas appliances. The propane hose has a POL and a 1/4" inverted male flare connector. The Stay-A-While tee has one 1"-20 male throwaway cylinder connector and female POL and Acme nut connector on the tee.