I have builders in my house doing various works, but at the moment my main concern is my water. When I have the taps on in my bathroom hand basin or bath and the kitchen taps downstairs are turned on, I lose all water upstairs. I have a new combi boiler fitted and my old one never used to do this. I did have a water tank in the loft in use before, which they have now disconnected. I wouldn't have thought this would be the problem though, would it? The plumber I asked said typically, " I have a combi boiler mate and it does the same in my house" Any suggestions would be welcome please. I am having an electric shower being fitted in the next couple of days and it's not going to be nice if this happens when I'm in the shower.
Thank you in advance for your help.