Originally Posted by
sreten
Hi,
I dug out the pump I have. Following FB's fix :
I moved the rubber ring on the other end of the
"hose"into the "head" and improvised a washer
for where the hose attaches to the pump.
It did work a lot better in terms of the amount
of air lost as you take it of the valve.
Not a lot of thread goes onto the valve though.
You don't need lits of threads to hold the head on since there's virtually zero load. One to two turns will do it. If needed add another O-ring or gasket until the valve depesser pin is below the rim of the gasket, so it seals before opening the valve, and unseals after the valve is closed when removing.
Yes, it is a cheap and not so great oump, and I wouldn't suggest buying on. But once you already have one, spending a few pence to make it work makes sense.