Toilet Flange Types

Toilet Flange Types – To be clear, we don’t want you to mix up a flange with a phalange. This is very important and only one can be found on an airplane, and under your toilet. Now, if this makes no sense to you, that’s fine. But if you know, you know.

Friends episode "Phalange"

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In today’s market, there is a wide range of flange types available, each based on the material used. These options include PVC, ABS, cast iron, brass, and materials designed for specific application requirements.

When selecting a toilet flange, it is important to consider the material of the DWV (Drain, Waste, Vent) pipe to which it will be connected. For example, if you have a PVC pipe connection, it is advisable to install a PVC closet flange. Similarly, a cast iron connection necessitates a cast iron toilet flange, and so on.

Understanding the various types, sizes, and features of flanges can be beneficial when repairing or replacing a damaged flange. However, before delving into the diverse options, let’s first explore the function of a toilet flange.

replacing a flange

The toilet flange, also known as a closet flange, serves as a vital pipe fitting that connects a toilet to the drainage system while securing it to the finished floor. Its primary function is to establish a secure and approved connection between the toilet and the home’s drainage system. To ensure stability and prevent movement, the flange is securely anchored to the sub-floor using a rust-proof screw.

It is important to avoid using drywall screws for this purpose as they can deteriorate when exposed to water over time. Such deterioration can lead to movement, potentially causing damage to the toilet flange and compromising its connection to the pipe.

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A watertight seal between the bottom of the toilet and the closet flange is created using a wax ring, which effectively prevents any leaks, odors, or sewer gases from escaping the fixture. To connect the toilet to the toilet flange, T bolts, sometimes referred to as “Johni-Bolts” by Oatey, are used and secured in place through slots.

Before venturing to a local supply house or hardware store to purchase a toilet flange, it is important to explore the different types available to ensure the correct selection that suits your specific application.

Types of flanges

As we mentioned, it is crucial to consider the material of the pipe and the connection method when selecting a toilet flange. Let’s explore the different types of toilet flanges available:

  1. PVC or ABS Toilet Flanges: When replacing a flange, Level Fit Closet Flange is a suitable choice. It connects water closet outlets to the plumbing system and sits flush on the finished floor surface. It is available with a stainless steel, metal, or plastic ring and can be installed over 3″ Schedule 40 DWV pipe, inside 4″ Schedule 40 DWV pipe, or over 4″ Schedule 40 DWV pipe.

For PVC or ABS applications, Closet Flanges are recommended. They come in various materials and styles, with a test cap that easily breaks out without falling into the drain. The Easy Tap fits over 3″ pipe or inside 4″ pipe. It is suitable for applications that require testing or for preventing sewer gases from escaping.

  1. Cast Iron Toilet Flanges: Cast Iron Closet Flanges are designed for use on plastic pipe or heavyweight, service weight, or no-hub cast iron soil pipe. They do not require caulking and come complete with the body, brass ring, bolts, and gasket. These flanges install on the outside of 3″ or 4″ pipe.

For broken cast iron flanges needing replacement, the 4″ Cast Iron Twist-N-Set® Replacement Closet Flange is a good option. It is designed to replace broken cast iron closet flanges and expands to fit inside heavyweight, service weight, and no-hub pipe.

  1. Brass Toilet Flanges: In some older homes with lead bends, brass closet flanges are still used. The connection process requires a skilled trades-person who peens the lead to the inside of the closet flange and joins the materials with solder. If the lead material is beyond repair, the old lead bend needs to be replaced. A Brass Closet Flange Replacement Ring is available for brass applications and provides secure attachment to the floor with three countersunk holes and three closet bolt slots.
  2. Specialty Options:
  • 45-Degree Closet Flanges: A ABS or PVC 45-Degree Closet Flange with a Stainless Steel Ring is suitable for applications where normal flange installation is not possible due to clearance issues. The hub of the closet flange comes off at a 45-degree angle, allowing for solvent welds over 3″ or inside 4″ Schedule 40 DWV pipe.
  • Offset Closet Flanges: A Level Fit Offset Closet Flange, used for PVC or ABS applications, can be rotated for precise alignment of bolts and screws. It provides flexibility with a 360-degree swivel, allowing the flange to be offset around floor joists or other obstacles during installation. It is available with a stainless steel or metal ring.

Now that we have explored the different types of toilet flanges, you can choose the appropriate one for your specific application. If you need help repairing or replacing a toilet flange, call the Pros at Budget Plumbing.

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