my sink fills up with water that is draining from washing machine - what could be causing thes

[belovedpickles]

[4getmenot]

All your drainage is backing up, I'd say you have a blockage between your kitchen Gully and the manhole, water cant drain away so its coming up nearest exit. If you have a manhole nearby you should try rodding the drain, if not ring a drainage company to come jet it out.

[cherrychapstick]

your sink is blocked !! had this problem about 2 months ago i done the work myself went under sink and took the pipes apart and cleaned them out if you are going to do it yourself remember a bucket ,sorry if that sounds a bit cheeky but i started loosening pipes then remembered lol

Cherry x

[Sandy-Wroe]

The drain might be frozen.