I have a leak in the area where my grey and black water tank is. I didn’t realize the tanks were full until the bathtub

Welcome to Just Answer I'm Chris aka Moose, I'm sorry you are having problems with your RV. I will do my best to help you get this resolved. If I happen to be helping another or step away during our communication, please know I will follow up as soon as I am back available/online.

• With the tanks empty. Once the water is turned on. Is it leaking onto the ground?
• If it does not leak onto the ground if you drain the tanks one by one, which is filling up on its own?
• Are your freshwater tanks empty?

Thanks for those details.

A of right now, it seems like you overfilled the gray tank, and the leak was coming from the top of the tank where the drain pipes enter it. You can address that another day if needed. The city water should not be filling either the gray or black tank unless you have a toilet or faucet leaking at its valves. I recommend leaving the gray tank open to drain while you camp, then close it on the last day so it can fill up so once you drain the black tank, you can use the gray water to clean the poo from your drain hose. If you are still worried the camper is using city water when you are not using any. You can place your ear to the hydrant to see if you hear a slight hum or whine noise that indicates water is flowing. You can also kink the hose and hold it. If the hose after the kink gets squeezable then your camper is leaking somewhere inside.

Thank you for visiting Just Answer, I hope I was able to answer your question. If you need to follow up on this concern please use the reply button. If you are satisfied with my answer please reply, let me know so I can complete your question. Stay safe (Covid). Moose

Gad to help, have some good times camping. Avoid the TV (news) that will make it better.

Thanks