Author: Gordon (NZ)
Date: 2003-03-28 13:36
Some people do a sucking test. This may not detect certain faults causing leaks as well as a blowing test. Try blocking the end and blowing into the other, one section at a time. With the upper section at any rate it should either be impossible, or really difficult to blow hard enough to make a key open and produce a hissing leak sound.
Did you ever check the register vent as suggested by Fred, 4th reply?
Even if you clean this with a pipe cleaner, lint can can move from the tube, to the end of the pipe cleaner, only to be re-deposited in the tube when the pipe cleaner is removed.
Remove the key, shine a light down the bore, and look down the regisgter vent to check that it is clear. (Easier in a dark room)
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