Home » Does the Toilet Flange Go Inside or Outside the Pipe?

Does the Toilet Flange Go Inside or Outside the Pipe?

Are you wondering if your toilet flange should go inside or outside the pipe? It is really up to personal preference. But generally, it is better to install the flange inside, as it creates a tighter seal, and helps prevent leaks. 

However, if the pipes are not in the best condition. Then putting the flange on the outside might be a better choice.

A toilet flange is a pipe fitting that connects the toilet to the drain pipe on the floor. It provides a seal between the toilet and the drain pipe and keeps the toilet in place. 

It is commonly made of plastic, metal, or ceramic. To ensure a water-tight seal; and support for the toilet, the flange must be properly sealed to the floor. 

Types of The Toilet Flange 

Are you looking for the right toilet flange for your needs? There are many different types available, each with its purpose! 

Standard toilet flanges are the most common and easiest to install. While large flanges are used in commercial applications or with thicker toilet bowls. Extended, offset, flush, floating, and raised flanges are also available for various purposes. 

  1. Standard Toilet Flange – This is the most common type of flange which is floor-mounted with a hole in the center. It is used in most residential applications and is the easiest to install.
  2. Large Toilet Flange – This flange is used in commercial applications or when a larger size is needed for a thicker toilet bowl. 
  3. Extended Toilet Flange – This type is used when the toilet needs to be mounted further away from the wall. 
  4. Offset Toilet Flange – This type is used when the drain pipe is offset from the center of the toilet.
  5. Flush Toilet Flange – This type is used in low-flush toilets.
  6. Floating Flanges – These flanges are not attached to the drain pipe but instead float on top of the water in the bowl. 
  7. Raised Toilet Flange – This type is used when the toilet is not level with the floor.

You can find toilet flanges in plastic, metal, or cast iron. Plastic is the most affordable but not as durable, while metal and cast iron will last longer but cost more. Whichever type you choose, you’re sure to find the perfect flange for your toilet!

Different-Size Toilet Flanges

Different sizes of toilet flanges are available to suit your needs, including 3-inch, 4-inch, 5-inch, and 6-inch flanges. 

The size you choose will determine the size of the hole. That needs to be cut in the floor for the toilet to be installed.

How does a Toilet Flange Connect to the Drain Pipe?

The most typical way to connect; a toilet flange to a drain pipe, is with a rubber or plastic gasket. which creates a seal. 

You can also use a metal flange; with a ring that goes around the pipe and is tightened to create a seal.

Pros and Cons of Using a Toilet Flange on the Inside of the Pipe.

When it comes to installing your toilet flange, you’ve got two options – inside or outside the pipe. Inside flanges create a tighter seal and are simpler to put in, but can be tougher to clean. On the other hand, outside flanges take up a bit less space. Though they may not look as nice and can be a bit tricky to clean. It all comes down to what works best for you and your bathroom! 

Pros and Cons of Using a Toilet Flange on the Outside of the Pipe.

Installing a toilet flange on the outside of the pipe can be a great space-saving solution for small bathrooms! 

It’s easier to install too since you won’t have to thread the flange through the wall. 

However, it may not look as aesthetically pleasing; and it may be more difficult to keep the flange clean. Since it will be exposed to more dirt and grime.


Ultimately, when it comes to deciding whether to put the toilet flange inside or outside the pipe. It is really up to you! 

Both choices have their advantages and disadvantages. So, take into account the space you have the ease of installation. And how it looks before you make your decision.