Engineers who prefer gravity waste systems cite its lower costs. But due to the structural issues and restrictive site conditions typically encountered during commercial remodeling, vacuum toilet systems are often the more cost-effective solution.
Prisons
Everything You Ever Wanted to Know About Prison Toilets
Inmates have a seemingly endless list of creative uses for the comby—a stainless steel combination toilet and sink—found within their cells. Some—like passing contraband—can be problematic, but a vacuum plumbing system can solve that.