Do washing machine waste hoses have a non-return device fitted?

seatbeltnoob

im waiting for a refurbished deal on a drain cleaner attachment for my pressure washer. I read that all other solutions just punch a hole through the clog and just temporarily solve the problem.

the washing machine waste shouldn't be a issue, it's running up and over the divider walls so it won't glow into the washing machine unless the water level is really high. something i overlooed when I originally posted.

ajfinch

Does anyone know where I could obtain a suitable non-return valve? 

EssexExile

You don't want a non-return valve in a waste pipe, it will just get clogged up.

seatbeltnoob

just an update, I ficed the problem with a pressure washer drain cleaner attachment. Same one as this.

https://www.youtube.com/watch?v=wiW5H3BsIzw

I was done shortly after I posted and it's completely solved the issue for the last 2 years. We had slow drain in the sink for several yers, now I am a bit sad and fill up the sink with dishwater, and pull the plughole and watch the water drain away so fast.