splendid9583

The most common problem is a valve at the back of the toilets that can be knocked loose and cause all of the toilets (which the Navy calls heads) in one of 10 zones to lose suction.

https://www.npr.org/2026/01/17/nx-s1-5680167/major-plumbing-headache-haunts-13-billion-u-s-carrier-off-the-coast-of-venezuela