1.You can install your 1/4" inverted torch inlet regulator into a 20lb-40lb LP tank (not a 1/4" male NPT) 2.The pigtail hose can also be used to connect to an installed 4-Port Tee as an auxiliary propane supply 3.Perfects for BBQ, RV and camping needs or having an outdoor cookout 4.High quality solid brass fittings-provides secure, airtight connection propane equipments 5.Installs quickly and easily tool-less attachment to propane tanks and regulator propane hose