We recently had a blocked drain that required sluicing copious amounts of water through it (as well as a bit of poking with a sharp stick) in order to unblock it. No problemo. Unfortunately the copious water sluicing drained our water tank in the attic.
What does this mean? Well you get airlocks in the pipe system. Airlocks mean no water. A bubble of air sits in the pipe between the tap and the tank and blocks the water getting through. So you need to get rid of the air. God bless Google, lets just whack in “plumbing airlocks” into Google and get lots of hits.
The basic theory is you use the pressure in the working tap to force the airlock out of the the blocked tap. Requires pipes and jubilee clips, basically you need to have been a plumber once.
However nobody seems to get airlocks in mixer taps. Well I had a brainwave tonight. So as indicated in the picture attach a balloon to the tap. Then;
- Open the airlocked tap
- Open the tap with water flowing
- Let the balloon fill
- Close the tap with water flowing
- Now with the airlocked tap still open, squeeze the balloon to allow the water to force the air out
- Rinse and repeat until the balloon starts to fill because water has started to flow
A few hundred quid in plumbing fees saved and me with a big shit-eating DIY grin on my face.