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.hundred percent high quality brass fittings for safety and tightness 4.It Provides thermal protection and excess flow protection 5.Great for BBQ, RV and camping needs or having an outdoor cookout GASSAF's 24" tailpipe propane hose connector is designed to connect a propane gas cylinder to an RV or trailer propane regulator, which has an ACME nut x 1/4" inverted male torch. It has solid brass fittings and is 4 feet long and is rated at 200,000 BTU per hour. Safety features include thermal protection in the event of a fire and excessive flow protection in the event of a failed gas line. You can use a 20 lb. or 30 lb. tailpipe that can be filled with a propane tank and connect it to a regulator or 4-port brass tee. It can also be used to connect an installed 4-way tee as an auxiliary propane supply.