I'm replacing a toilet in a 1920's house. Current rough-in is 13", bolt-holes to wall, thanks to added drywall and tiling. So a 12" rough in should work. However, there's a 6.5' high by 2.5" wide "bulkhead" running along the floor behind the toilet. leaving a 10.5" rough-in at floor level. So a toilet that uses the 12" rough-in distance all the way to the floor won't work. Suggestions?

Hi Johnmorr

I am unclear here... is this a floor mount toilet or a wall hung toilet?

If this is a floor mount toilet then you can purchase a 10" rough in toilet at almost any plumbing wholesaler or can order one through any home improvement store (most will not have these in stock, or at least choices will be limited).

Let me know more, OK?

Mark

Thanks for the quick response

It's a floor mounted toilet.

I guess the 10" toilet would work... But it would leave a 3" gap between wall and tank, and stick out farther into the room. And big-box supply is slow and/or limited.

I may need to check out individual 12" rough-in toilets to see if they have 7" vertical clearance, 10.5" behind the flange bolts...

I think that is more than reasonable if you have the time to explore here.

With all the different toilets made nowadays, you may actually find a 12" rough in toilet that works here.

Be clear that "specification sheets" on the products will show as 12" rough in, finished wall to center of toilet bolts, so you can't rely on spec. sheets. In my opinion, your best bet will be to drop by a plumbing supply store with a showroom... take measurements on the spot!

Good luck here!

The back of the tank extends beyond the base of the bowl. Therefore, it is the first thing to hit the wall and is your limiting factor. Depend on model, there is usually 4 to 5" between the base of the toilet bowl and the baseboard. Plenty room for your "bulk head".


So a toilet that uses the 12" rough-in distance all the way to the floor won't work.

What does "toilet that uses the 12" rough-in distance all the way to the floor", mean?

The back of the tank extends beyond the base of the bowl. Therefore, it is the first thing to hit the wall and is your limiting factor. Depend on model, there is usually 4 to 5" between the base of the toilet bowl and the baseboard. Plenty room for your "bulk head".



What does "toilet that uses the 12" rough-in distance all the way to the floor", mean?

To the toilet manufacturer, the rough-in distance tells them how far behind the flange bolts the toilet structure can extend, right? (With a little extra space, hopefully). I'd like a toilet that only extends back from the bolts about 10 ", until above a point about 7" off the ground. Above that, it can use the 12" spacing...

About the first part of your reply: That's what I thought when I headed off the the big box. But looking at the various models mounted on the wall (itself a strange sight!) I wasn't so sure that there would be enough room for my bulkhead. Many of the designs seem to extend down from the tank to the floor, nearly vertically. The current toilet being replaced was manufactured in 1972 .

I've made a little gauge 7" high, and need to see how close it comes to the bolt-holes of any particular 12" rough in toilet, from the back, before hitting the toilet. If it's less than 10", it'll fit my rough-in.

Thanks for the help...