No Flow Cold Water Bath

[DerbyBeast]

I have recently fitted a kitchen downstairs, for which I had to drain the water system - but forgot to open the taps upstairs and think I've now got an airlock.

I have a mixer tap in my bath, but only the hot water works. No flow from the cold. My sink in the bathroom works fine.

I took the tap apart last night - and nothing happened.

When I turn the cold water bath tap, I can hear a very feint air blowing/hissing sort of noise...

The water pressure in my house is normally fantastic...

Help!

 

[Plumber Will]

Is the mixer tap a shower mixer?

 

[DerbyBeast]

Sort of... The mixer tap has an unused attachment on the top that looks like it could be used for a shower (but no need, as I have a seperate shower). Tried unsrewing that, but nearly broke my bloody fingers trying!

 

[ChrisR]

turn on both H and C at the mixer, then put your hand over the end. Idea is to get the moving water to push air back up the other pipe.
Often it takes the mains, though.