mahnamahna wrote:Just one more thought. All the airlines in the world use vacuum toilets, there must be a reason they prefer them over pumps and macerators.
Yes there is. Water is heavy, vacuum weighs nothing. In boats we have an unlimited supply of seawater right under us. Aircraft have to burn fuel to carry water. At high altitude aircraft are surrounded by near vacuum, just as our boats are surrounded by water. In both cases it seems logical to use what's freely available, just outside the hull, to flush the toilet.
Do Lavac guarantee that tampons won't block their toilets? They certainly can block block the usual 1 3/4" line when they are saturated. Do they specify bigger plumbing?
If you don't have either a sign or verbally ask people not to flush tampons, I would say you can look forward to a lot of extremely unpleasant tasks.