Well I love this old thread .. I have learned a few things about cleaning tile and grout . Some people you make really happy and some people are not too happy when there grout comes out of the tile floor on about 60 percent of their tile,, So I have decided to stick to hood cleaning.. I have done a few floors with my set up and I have done a few using the 21 inch mosmatic surfacer and the sirocco vac unit that I guess belongs to my buddy.. The time difference is that the sirocco unit is way quicker , even though it does trip breakers every now and then... But when a customer calls for this service and I give them a price they are expecting a 20 year old floor to look like brand new and when this does not happen then they don't pay...Anyway I have the 12 inch Mytee and yep it works ok.. My 6.5 hp wet vac will barely get up 5 gpm but it does work..But this was a good thread and I still plan on building a bigger wet vac I just got so busy with the hood cleanings I have hade to slow up on the other stuff