Firstly, you have to connect the grill well, then open the gas, or the safety device will work and no gas come into the grill.
The hose connection male adapter is only suitable for 1lb regulator (1"x 20 female connection), it cannot connect a low pressure regulator with QCC1 or pol inlet fitting.
Designed with the over flow valve , if the grill connection loose, the gas will be shut off. And The needle valve is good for adjust the gas flow, if you want to stop one of grill, just close the needle valve , and if you do not use it for long time, close the cylinder valve as well.
Specifications
Item: Y Splitter CGA Propane Tank Converter Adapter Hose
Length: 5 feet / 60Inch / 152 cm
Connection 1: QCC1 / Type1 Connector
Connection 2: 1lb Propane Regulator Thread
Thread: 1"x 20 Female Throwaway Cylinder Thread) to 3/8" Male flare (5/8"-18UNF
Completed with Control Needle Valve
The Y Splitter CGA Propane Tank Converter Adapter Hose
can be used for camping, heating or outdoor cookout, and fits for campimg stove, protable grill, tabletop grill, lantern, heater and so on.