Hello, I need to buy & instal 3 toilets an all three have different rough ins 11in. 16 in. & 12in which is standard i guess. What size of toliets should i buy? Maybe a 10,12,& 14.or what. Thanks so much Darwin. Darwin@aol.com
You can also change the flange. They sell offset flanges that might bring your 11 out to a 12". The actual rough in measurement determines how far off the wall the tank is. Don't forget to add for drywall, tile,etc. Good luck.