Hi all I have just joined and just purchased my first motorhome, we are loving it, just come back from a weekend away where I have found that we have a grey waste leak, I have sussed out that it is from either or shower tray, some goes into the greys tank but a lot is leaking from the back corner and has been for a little time by the looks of it. It was mainly coming from the back corner because we was parked on a slant that I could not get it any leveller. In side us dry it must be leaking in between the inside floor and the out side floor, it also must be after all3 pipe have joined each other. Any one got any ideas? We have a hymer E690 1979.