by plumbbob »
Sat Sep 12, 2009 2:25 pm
It's an airlock most probably. If the sink has mixer taps, put your thumb over the outlet and turn the hot on fully. Now slowly open the cold for as much pressure as you can hold. Count to five and turn off the cold. Let go and water should be aplenty from the hot.
If the taps are individual you need a short length of hose to link the two.