Thanks for the reply the pipes are all clean as I had to replace them all a few weeks ago and the pipes ar all 1.5
Could t be the way the pipes are set out?
Hello I have just got a new washing machine, all plumbed in and working fine.
BUT... When it pumps the water out some of it comes up the sink. And I just wondered why as the old machine did not do this.
The waste pipe is connected between the sink and the u bend.
Might that be the...