I wonder if anyone on here can help me.... about 7 years ago we had a loft extension done and, at the same time, the plumber on that job replaced our existing "family" bathroom. Once he'd finished I noticed that a lot of swarf and "muck" was emerging from the taps in the bathroom (bath and sink) but he said this was caused by the "disturbance" to the cold water tank in the loft being moved during the loft extension build and it would settle. After about a year all cold water to the sink, bath and toilet in the "family" bathroom ceased. Couldn't find original plumber but found some advice on the net about putting a mains fed hose onto one of the taps thus forcing water through the system. This worked, and it has been fine ever since. Until the last few months. It happened again in January so we used the same method but it has happened again twice in the last four weeks and, obviously, we can't keep pulling a hose through the house to fix the problem. The hot water through the whole house (hot water storage system) is fine. All mains fed cold water is fine. The cold water storage tank in the loft fills just fine. The only "equipment" effected are the cold taps and the toilet cistern in the one bathroom. Is there some kind of "wire" or something similar to what you would use on blocked waste pipes which I could run through from the outlet in the tank? Thanks for any help you can give.....