Hi,
I have toilet downstairs and upstairs. If you flush the one upstairs, it starts making a noise, if you also flush the downstairs one near enough the same time, the noise becomes really loud . The only way to reduce the noise is to put the sink tap on, but once you close the tap, it sounds again. Any idea what it can be? thanks
I have toilet downstairs and upstairs. If you flush the one upstairs, it starts making a noise, if you also flush the downstairs one near enough the same time, the noise becomes really loud . The only way to reduce the noise is to put the sink tap on, but once you close the tap, it sounds again. Any idea what it can be? thanks