[rheavn]

I own coach 531. I posted the 12V air system for your coach. It will allow you to figure out if your toilets really are leaking in just a few minutes. Just because your toilets won't flush DOES NOT mean that the toilets are leaking--it just means that you do not have enough air pressure to flush.

https://newellgurus.com/showthread.php?tid=2674

To start verifying where the leaks are, start by shutting off your 120V air compressor. Now drain the air out of your air system. Once your supply gauge is zero, turn on your 12V air compressor. Let it air up and shut off. Now how often does it come on? If it is coming on often, you now know that you have an air leak at either one of your toilets, one of your air seals, or one of your pocket doors. Now your slide seals have shut off valves and regulators that allow you to see if the shut off valves or slide seals are leaking.

My advice is to not assume where your air leak is, but use an organized approach to finding your leaks. With what you have posted, you only know that you have air leaks--it could be as far away from the toilets as the dashboard. These tools will help you.

https://newellgurus.com/showthread.php?tid=2705

FYI: In 15 years I have never found a broken airline, but that doesn't mean it couldn't happen. Or something could rub a hole in an air line.