Waste tank sucked in
Hi Everyone I have a question regarding my waste / grey tank. It was pumped out last year and everything was good. We have used it for 4 weekends and got a pump out before our trip this last long weekend. After the pump out we used it for 4 days and went from simcoe to the severn and back. When we arrived on Sunday to close up I looked in the engine bay and the tank was completely sucked in. I checked the 5/8 vent line and it blew through. Any ideas? If I have to replace the tank I don’t want to see this happen again.