WE want to put a bathroom in the garage so that when my husband comes home he can change there and shower so that he does not bring in all the dirt that is on his clothes. The bath will butt up against the house wall and foundation. The question is how to do the plumbing for the toilet. All plumbing for the house is on that side, but the sewer drain is farther down toward the other end of the house. The garage sets about 18 inches below the house floor.
WE thouht about an upflush unit, but I do not know much about them. I know that they are mainly used in basements.