Hey all,<br>I need to figure out how to drill the hole for the shower drain in my future van. I've seen some YouTube videos about how to actually drill the hole. But, I need to know what to do after the hole is drilled. Should the hole be treated with something to prevent rust? Should the hole be lined with a rubber grommet? <br><br>Based on some folks suggestion regarding the shower drainage, I plan on just having the gray water drain directly out of the van onto the ground. I figure that the stuff that currently flows into gutters and storm drains is way more toxic than just a few gallons of soapy water.<br><br>Anyways, I was thinking about slipping some sort of cylindrical funnel (about 2-3 inches long) that would direct the water from the inside of the van through to the ground. If that is the right method, should the funnel be secured with some sort of caulking, so the water doesn't leak underneath the shower pan and be trapped inside the van, causing mold, mildew, etc.?<br><br>