Hey all, I’m having a problem with the plumbing in my flat. Last night when I turned the hot tap on in the bathroom it started making a noise like a fog horn. I have a single tap for the hot and cold water. It’s never done it before. I also tried the hot tap in the kitchen (which is a mixer tap) and when turned to hot only it also made the fog horn noise. Only the hot tap is making the fog horn noise. I have also noticed that the cold tap when running is making a rushing noise and so is the toilet when it is filling. The water is also coming through very forceful. Any ideas what is going on? My plumbing skills are zero so I don’t have the first clue on how to fix it. I live in a flat which is on the fifth floor. The fifth is also the top floor. I don’t have central heating so no radiator’s are installed. My landlord once told me that he attached the cold water supply direct to the mains so as to get high pressure for the flat being on the fifth floor??? There is no pump fitted and the pressure of the water is high as you can run a shower with no problems. In the cupboard there is a water heater that looks like an immersion heater and another round tank which I think is a expansion tank. It’s all very old and my landlord once said the expansion tank was no longer used, though it is still connected to the pipe work. Could it be an air lock or something more. Can it be something I can fix myself?