Hi, last week after defrosting the fridge I noticed some water on the floor. I'd been most careful and put several towels inside the fridge and gathered up the ice as it melted so don't think the water was from that. I lifted the seat next to the fridge which houses the water heater etc and the floor was really wet. I mopped it all up and put kitchen towel done then checked the pipes for any obvious breaks etc. All seemed ok and I cleared the paper away. I then emptied a washing up bowl down the sink, went away for a few minutes and when I came back there was more water! Drain pipe, I thought! But how do I get at it? Local repair man said to remove the top one of the two grills out side the van to access the pipes but how do I get it off? The don't seem to be any obvious screws. Help!