Toilet Flange Theory: Difference between revisions

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*Key insight about flange types - [[Toilet Flange]]
*Key insight about flange types - [[Toilet Flange]]


=Standard Design=
*Standard best practice is to use 4"x3" closet bends. If it is 3" on top, it is more prone to clog. [https://www.google.com/search?q=is+a+3%22x3%22+closet+bend+more+prone+to+clog+than+a+4%22x3%22+closet+bend&sca_esv=d30c0cc97334f82b&sxsrf=AHTn8zpEuCoENuEneW-JMKTeF3ctU-7jJg%3A1741416200953&ei=COfLZ4LzOdXKp84P2dOCwQc&ved=0ahUKEwiCl8Hw8PmLAxVV5ckDHdmpIHgQ4dUDCBI&uact=5&oq=is+a+3%22x3%22+closet+bend+more+prone+to+clog+than+a+4%22x3%22+closet+bend&gs_lp=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&sclient=gws-wiz-serp].
*Note that the 4" top design is more tricky for the ground floor, where an extension pipe must be used from below the concrete in order for rough-in plumbing to clear the bottom of the foundation rim. Otherwise, you are sending PVC through concrete. Due to this - we use a 4" riser for the first floor toilet. This leaves only the option of using a toilet flange that is '4" inside fit', such as this [https://www.homedepot.com/pep/Oatey-Fast-Set-3-in-Outside-Fit-or-4-in-Inside-Fit-PVC-Open-Hub-Toilet-Flange-435032/100344482?source=shoppingads&locale=en-US&pla&mtc=SHOPPING-BF-CDP-GGL-D26P-026_001_PIPE_FITTING-NA-NA-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NEW-PMax_BHU24&cm_mmc=SHOPPING-BF-CDP-GGL-D26P-026_001_PIPE_FITTING-NA-NA-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NEW-PMax_BHU24-17697557984--&gad_source=1&gclid=Cj0KCQiA7NO7BhDsARIsADg_hIZJkHbNS2qV33SYa_q_Ds5lnIsR0uTlCaWLeFXqH0RLMwHwnKfJ8-caAnFzEALw_wcB&gclsrc=aw.ds] - meaning it actually fits inside 4" schedule 40 pipe, not into a pipe coupler (closet bend top end) as on the second floor.
=Links=
=Links=
*[[Composting Toilet]]
*[[Composting Toilet]]

Revision as of 06:48, 8 March 2025

  • Best practice: male spigot goes into 4" pipe or 4" fitting. Not female, not 3"
  • Check.pngFlange height - on top of floor [1]. This is because bottom of toilet is recessed [2]
  • Thread with clear conclusion that bottom of toilet flange sits on the finished floor. [3].
  • Here my main man is not so hot - says that flange can be flush with finish floor, not on top of finish floor. [4]
  • Key insight about flange types - Toilet Flange

Standard Design

  • Standard best practice is to use 4"x3" closet bends. If it is 3" on top, it is more prone to clog. [5].
  • Note that the 4" top design is more tricky for the ground floor, where an extension pipe must be used from below the concrete in order for rough-in plumbing to clear the bottom of the foundation rim. Otherwise, you are sending PVC through concrete. Due to this - we use a 4" riser for the first floor toilet. This leaves only the option of using a toilet flange that is '4" inside fit', such as this [6] - meaning it actually fits inside 4" schedule 40 pipe, not into a pipe coupler (closet bend top end) as on the second floor.

Links

How to Install a Toilet

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