I have not yet used this but it looks like a very good quality item.

This little device here is super handy . I used to toss the smaller green propane bottles, but now I’ll never throw one away again this worked perfectly

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Propane Adapter 1lb To 20lb, QCC1 Propane Refill Elbow Adapter With Gauge And ON-Off Control Valve For 1LB Propane Tank To Be Refilled Gas From 5~40 LB Propane Tank

Ninemine INC

شراء Propane Adapter 1lb To 20lb, QCC1 Propane Refill Elbow Adapter With Gauge And ON-Off Control Valve For 1LB Propane Tank To Be Refilled Gas From 5~40 LB Propane Tank