I'm a tenant of an ex-council flat and unfortunately the cold water tank is in a cupboard in my bedroom. There has been problems with the ball c*ck in the tank, and I believe a plumber has replaced it. However, when the toilet is flushed or someone takes a shower, the tank is very noisy when refilling. There is a gush for about five mins then it continues to trickle for up to an hour. As you can imagine, this keeps me up at night.
Is the tank malfunctioning? Is there anything that can be done to make it quieter?
Thanks!