Thank you. I'll give it a try. It is from the tank.
EDIT: The cold tap on the bath trickles, but there's chuff-all from the basintap or into the toilet cistern. But the reassurance to bath is greatly appreciated. :D
The water has been clear.
I was thinking air couldn't have got into the pipe, because I hadn't allowed the water level to drop below the top of the outlet. Though I guess water is displaced by incoming water splashing around, when the level is so low.
Thank you so so much!!!!! I had got...
About 2 weeks ago, I discovered a hairline crack about 1/4 way up water tank in loft (causing a wet ceiling).
A plumber has been out to measure up to replace tank, but is busy until next week.
I have, so far, been "managing" the crack in the loft tank by maintaining the water level so that...