by col111 »
Sun Apr 15, 2007 8:45 pm
I used to have this problem too. The cause of the smell in my situation was that the washing machine flexible waste pipe looped down below the level of the waste water trap under the kitchen sink which created back suction (called siphoning I believe), so the water in the water trap was sucked out by the washing machine pump which meant that the water trap was empty and the smell from the sewage waste pipe drifted up out of the kitchen sink drain, phew! It was simple to remedy by re-routing the flexible washing machine waste pipe so that it no longer looped below the level of the water trap. Colin