Turned out to be the s & f gibbert filling valve in the downstairs toilet. Upstairs toilet running on was just down to the button getting stuck on occasion. Water hammer has been partially solved by turning down the water pressure and going easy when turning off the tap. :)
Hi All
Before i call out a plumber i thought i would see if anyone could shed light on what is causing this issue.
Whenever i flush the upstairs toilet or use the cold tap (never happens with the hot one) in the bathroom next door the plastic tank behind the downstairs toilet begins to...