The last (actually first) time I had my new to me trailer out I stopped at a rest area and noticed water dripping out of small hole at the left rear corner of the holding tank. At the time I thought it was odd because the tanks were both empty but figured I had a leak and the sloshing around had caused a little water to drain out through the hole. While using the trailer that week I put a lot of gray water into the tank. It seemed to hold it but I figured it was just a really minor leak.
Fast forward to today when I crawled under the trailer armed with 3M 5200 and a hair dryer to attempt to plug the leak - I noticed that the hole appears to be perfectly round? About the size of my pinky. Is this some sort of drain hole for the interstitial space between the actual tank and the insulation/armor?
Do any owners of similar Bigfoots out there also have this hole? Thanks for checking.