How to Replace an Offset Toilet Flange


An offset toilet flange allows you to adjust toilet position around the floor joists, meaning the toilet does not sit directly above the hole. Most building codes will not allow you to replace traditional toilet flange with offset toilet flange. However, if you have a toilet with offset flange and want to install a new one, that is acceptable, since it would be considered maintenance. Here are some tips for replacing offset toilet flange.

Remove the Toilet and Old Flange

For this project you will need

  • replacement offset flange
  • rotary tool that has a cutting blade
  • safety glassesl
  • an adjustable wrench
  • old rag or towel
  • caulk
  • PVC cement
  • PVC primer
  • four treated deck screws
  • expanding foam
  • tape measure
  • cordless drill

Shut off water to the toilet and flush it to drain all the water. There should be a shutoff valve near the toilet.

Remove the toilet by unscrewing the retaining bolts with an adjustable wrench on the sides and set it in a safe place. Remove the wax ring, and loosen the screws that secure the old flange. Stuff an old rag or towel in the soil pipe to keep gases from entering the room

Get the Right Fit

Figure the correct position for the flange. One of the things you must consider in the fitting of the flange is the sub floor. If there is a bare sub-floor under the toilet, it will likely be obvious with an offset flange. Keep dry fitting the flange until you get the desired fit, and mark this position with pencil. Place it in a position so there are no seams that could cause a backup in plumbing. 

Install the New Offset Flange

With the rotary cutting tool, trim around the piping on the marked areas to make room for the new flange and dry fit again. Apply PVC primer to one inch of the soil pipe, and follow for directions for drying time. Coat the inside of the flange with PVC cement, and insert it in position according to markings.

Hold the flange in place for several seconds until it is set in the cement. Drill the deck screws in the mounting holes, and spray expanding foam over the area to cover gaps. Apply a thin layer of caulk around the flange, and allow it to dry for about 12 hours before reinstalling the toilet.

Turn the water back on, and test the installation for proper operation. If you spot a leak or have problems with sewage backup, contact a plumber like Two Men And A Snake.


24 August 2015

Home Remedies for Plumbing Problems

Hi and thanks for visiting my website. My name is Bob. I am 32 years old and single. And like many of you, I am barely making ends meet on my own. That's why I decided to create this website. I've run into a few plumbing problems in my home, and in order to save money, I found some remedies that I could do myself, rather than calling a plumber. I decided to share these secrets with you, as well as tell you when a plumber is absolutely needed. I hope my website helps all of you do-it-yourselfers when it comes to fixing your plumbing.