Really, the only way to stop leaking stopcocks is use a rotary type valve.
If you can find some 300 grit silicon carbide abrasive...valve grind paste at an auto store ....something like that. You might be able to make the key
and barrel somewhat more acquainted with each other and the problem will resolve. The concept of interchangeable becomes less relevant, but who cares
when it's one sep. funnel in a drawer? |