Lol well the jive is .. not having seen the inside of the valve - it
would be nice to know if the replacement consists simply of the
removable part that can be un-screwed from the main housing .. or am in
for the bigger job of letting go the vent pipe as well ..if its simply
a needle valve then its possible it may be 'cleaned'


Tried a few times to clear - by pressurising the system and venting ..
no joy .. still have a slow drip from the vent pipe out side ..

the 22 mm is the valve housing . o/p pipe is 15 mm