Hi, can anyone help me?
I have a flat on the first floor of a five floor building. When I run either the dishwasher or the washing machine in the kitchen I get a backflow of dirty water into the kitchen sink.
Normally the sink drains fine.
Is there anything I can fit to stop the water coming back into the sink - some kind of back flow device? I've had a look about but can't see anything appropriate.
Any advice would be really appreciated!