DIY Doctor UK DIY Forums

Hi we have had a problem developing for quite some time now - if we flush our upstairs loo we get a fog horn sound made worse when running the cold water. The pipes then seem to knock and I can feel them going to the sink and bath - we've tried to contact a plumber but they are as rare as hen's teeth in my neck of the woods!
Any help would be gratefully received......
I had thought maybe we should drain the cold water tank as I suspected an air lock so would this help or hinder.....calling all DIY gurus!!!

Cheers

Fedupwithfoghorn,
If you have a mains fed loo and the cold water is the mains tap have a look and see if you have a non- return valve in the mains in pipe.
If both are fed from the cold tank replace the ball valve on the cold water tank.
end

Replace ball valve in toilet cistern.


htg