I live in San Francisco and have a home that is more than 50 yrs old, complete with a 14" toilet rough-in. I would like to buy a new toilet with pressure assisted flush, Flushmate or anything else you recommend. I've looked at Toto and Amer Std, but can't find 14" with pressure assist. Toto makes something called a "14 inch Unfit Rough-in," but I'm not sure if that does what I need. Can anyone give me some toilet suggestions, short of rebuilding my home? Thanks.