My first trip out with my new 'old' van (Compass Magnum Mendip 505). I connected two plastic pipes to the waste outlets and inserted them to my waste water carrier. It became apparent that the water was not draining in to the carrier but was exiting the caravan through an exit under the van towards the front of the van (the waste exits are towards the rear)... perhaps i'm missing a pipe or something? Any help, information and advice appreciated. Cheers. Andrew.