Welcome to Plbg.com
Thank you to all the plumbing professionals who offer their advice and expertise

Over 698,000 strictly plumbing related posts

Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by:  

Post New
Search
Log In
How to Show Images
Newest Subjects
 Rough In (Toilet) measurement
Author: ragincajun (TX)

Found a hairline crack in my current toilet so I need to replace it.

I've read up on how to measure rough in (which I'd never heard the term before). I just want to make sure I'm calculating correctly.

Between wall and tank is approximately a 1" gap.
From wall to bolts on base of toilet is 11".

So I'm guessing my rough in is 10" and not 12"...correct?

Post Reply

 Re: Rough In (Toilet) measurement
Author: packy (MA)

no, the rough in measure is 11 inches. you currently have a 10 inch toilet installed which give you the 1 inch space behind the tank.
so, some 12 rough in toilets will fit with 11 inches of space. I think to be safe you should get a 10 inch rough toilet.

Post Reply

 Re: Rough In (Toilet) measurement
Author: KCRoto (MO)

I think a Toto Drake will fit still even on a 12" rough, but check the specs to be sure.

Post Reply

 Re: Rough In (Toilet) measurement
Author: packy (MA)

i'm gonna say 11 1/4 inches but not 11. anyway, i believe the drake comes in 10 inch R I

Post Reply

 Re: Rough In (Toilet) measurement
Author: KCRoto (MO)

10.75" [assets.totousa.com] It shows the tank with a 1.25" space between the wall and tank on a 12" rough.

Post Reply

 Re: Rough In (Toilet) measurement
Author: packy (MA)

yikes, i didn't know that. BUT, does the very back of the toilet bowl footprint bump into the wall at 10.75 rough?

Post Reply

 Re: Rough In (Toilet) measurement
Author: North Carolina Plumber (NC)

Going by the spec sheet the bowl is at least as far from the wall as the tank.

Post Reply

 Re: Rough In (Toilet) measurement
Author: sum (FL)

So if you have baseboards (and sometimes even a quarter round in front of that) that may come into play.



Edited 1 times.

Post Reply

 one picture worth 1000 words
Author: packy (MA)


this shows the drake 2. only 5/8 behind the tank.
also 1 9/16 behind the bowl put 3/4 thick baseboard on the wall and the clearance is 7/8..

Post Reply

 Re: one picture worth 1000 words
Author: ravi102769 (VA)

Most of the 10" rough toilets the tank is the only thing that is different. Buy a 12" and return the tank for a 10" if it doesn't fit.

Post Reply





Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:




Special thanks to our sponsor:
PlumbingSupply.com


Copyright© 2024 Plbg.com. All Rights Reserved.