i used my knaus traveler i used my sink 2weeks ago and we went off last weekend and the sinks were bloced so i took out the ubend filter and cleaned it out and water came down the piep i put the ubend back and still nothing worked ive poked all the pipes and nothing can eny body help please
yes thanks tride that and tride siknk pipe cleaner still dint work dont know what to do
No need to dismantle your whole system in most cases. There is obviously a blockage between the U bend and the tank.
Go to Wickes DIY and buy a waste pipe cleaner/rodder. It's like a big spring which is 2 or 3 m long and it will go round right angles in pipes. It's got a corksrew thing on one end and a handle on the other which enables you to rotate the spring. You screw the end into the blockage or push it to break it up. If your pipe run is very long you may need to work from the other end too.
An idea ,if you can get at the pipe going into the waste tank, disconnect it and put a garden hose up it and seal with gaffa tape and get some to turn the hose tap on whilst you are in the van! You can then shout 'turn it off' if the water comes through.
Peter