Wash Machine emptying water backs up and overflows

Hi - Mr thicky here. Having a problem with water not draining away from washing machine when rinsing / spinning. The water leaves the machine via a flexible plastic / rubber pipe which is inserted into a plastic drain pipe (down pipe) about 12" of the flexible pipe is inside the down pipe. [I have tried adjusting the mength of this insertion without effect] This down pipe (about 22" long) ends in a U connection and then runs into the plastic waste pipe and eventually into the drains. It is also connected to the same plastic waste pipe that the kitchen sink uses.
Problem arises when wash machine goes into rinse / spin mode and discharges water at a faster rate than the pipe can cope with and it backs up and spills into the kitchen cupboard which is below the sink etc.
Have tried using proprietary sink clearing chemicals which don't have an effect on this problem. Also the sink water discharge has now come out in sympathy and water is draining very slowly and there's a lot of "Gurgling". Any plumbing wizards are invited to help Mr Thicky with solution. Could it be an air block and if so what's the best way to shift it. Have a great day everyone - Jeff

Invest in a wastepipe snake .....like a glorified net curtain spring take the pipes apart @ the trap (u bend) and poke about with the snake...then assemble and flush with hot water .....the nuts should undo by hand on the traps

Nige F said:

Invest in a wastepipe snake .....like a glorified net curtain spring take the pipes apart @ the trap (u bend) and poke about with the snake...then assemble and flush with hot water .....the nuts should undo by hand on the traps

Click to expand...

Thanks Nige - I'll give it a go

The answer is probably going to be messy!

If the waste runs into gulley outside, check that isn't blocked, or backing up if you tip a bowl of water down your sink. It should swallow water from the waste pipe with room to spare. If it fills so the end of the sink waste pipe is under water it may need cleaning out.

When checking the traps aren't blocked, be ready for some water running up your sleeves. Any blockages normally settle at bends or elbows.
(When checking either trap don't tip any water down the sink - it will cone out wherever you have disconnected any pipe to either trap. Don't ask how I found that out! )

Thanks Tickly - Sleeves rolled !