Connect 2 oxygen hoses to the same regulator.
If you are running 2 torches but intermittently, then separate control valves at the tee are a better option than maintaining pressure all the way to each torch’s valves. The hoses or torch valves could be leaking.
Solid brass construction, designed to last a lifetime. Control valves with positive feel shut-off
This tee has Aus/NZ AS1335 hose connection (5/8″-18 RH). Contact NGP if you would prefer USA thread 9/16″-18
Individual control of each hose line you connect. You need a pair of these tees (RH & LH) to create this system.