My bad, Rob is right I was thinking back to when I had a 'bomb 3 way' on my cocker, just remembered it was faulty hence the leak!Originally posted by RobJenkins
The three way should not leak when holding back the trigger and should only expell a short blast of air out of the front of it when the back block changes position. This is just the exhaust gas from the ram.
If there is a persistent leak when the back block held back. The three way is not timed correctly causing it to not seal properly.
I could be wrong, but mine has never leaked air when the back block is held back.
Hope this helps
Rob