Upstairs Bathroom Water Problems after Draining System

[Ade1]

Hi - never known this before.......turned off main under kitchen sink,, drained header tank and hot water, to check power shower connections. All fine. Mains on again - hot water to bath is fine, but no hot to sink in bathroom. No cold water to bath, cold water to sink as mains fed. Toilet is refilling. So problem is cold to bath and hot to sink. Obviously not touched anything else.
Any help greatly appreciated.

 

[Ermintrude]

Cold to bath and hot to sink have an airlock and are both fed from cwsc in loft. If your lungs strong seal your lips round tap open and blow , or attach a wetvac and suck it out. U could try and suck on taps but in experience it don't work so well .

 

[solutions]

If the sink tap is a mixer try pressing your palm over the spout ideally with a tap washer or rubber glove or something to save your skin open the tap so it is half and half and assuming there are no check valves the cold mains will push back up the hot pipework untill it reaches the hot cylinder and then push up the low pressure cold feed to the cylinder and back fill the cold water cistern pushing any air out along the way. This obviously wont help with the cold on the bath. This is far from ideal as you never normally want to directly connect a fresh mains supply with water and pipework that may not be sanitary hence air gaps on ball valves, check valves and those silly loops that are meant to stop your shower dangling in a full bath or basin.