They are needed to do the pressure test not the flow test and it's possible to rig up hoses and gauges to do the same thing. The flow test only requires a graduated cylinder or beaker to catch the gas and some way to turn the pump on. Be careful that you don't burn your garage down.
You're not looking. A guick look for the 09940-40211 adapter shows that it's available from many sources. But it's not cheap.
You're not looking. A guick look for the 09940-40211 adapter shows that it's available from many sources. But it's not cheap.