Use a tape measure to gauge the rough-in from the wall studs where the toilet will sit to the drain pipe center. Having this measurement will tell you where to place the flange. 2. Mark the Flange Hole Center Point If you need to raise a toilet flange for tile, you will first need to remove the old flange. To do this, unscrew the bolts that secure the flange to the floor. Once the bolts are removed, you will be able to pull the flange up and out. The flange consists of two main parts: the collar and the flange ring. The collar is the part that fits inside the drainpipe and connects to the waste line. The flange ring is the circular piece of material that attaches to the collar and is used to secure the toilet in place. The ring also has a series of bolt holes that allow the toilet to be anchored to the floor. Understanding the anatomy of a toilet flange is crucial in ensuring that you have the correct size and material for your installation needs. Why is the right size toilet flange important for a 4 inch pipe Some simple circular flanges while others have an elbow joint attached that are designed to connect to drainpipes. First, turn off the water supply. Then, remove the screws that hold the toilet bowl to the floor using a screwdriver. Next, lift the toilet bowl carefully, and you will be able to access the existing flange. Measure the diameter of the outside of the flange using a tape measure. The reading will give you an idea about the flange’s size, whether it’s a 3-inch or 4-inch flange. Make sure you measure each side to ensure accurate readings. Based on the measurements, you can decide the size of the toilet flange required for your 4-inch pipe. Different types of toilet flanges available for a 4 inch pipe

Most toilet drain pipes are 3 inches (7.62 cm), but some houses have 4 inches (10.16 cm) DWV piping. Such wider pipes require a toilet flange with a bottom diameter of 4 inches (10.16 cm). A 4×3 toilet flange may or may not fit a 4 inches (10.16 cm) DWV pipe. The composition of Offset toilet flanges is a variety of materials, mostly PVC and cast iron, and come in a variety of quality levels. Getting the right flange hole size ensures this vital component can do its job. An improperly sized hole can lead to leaks, loose toilets, and foul sewer gases entering the home. No fun! Plastic flanges come in two variations, that is, ABS (Acrylonitrile Butadiene Styrene) and PVC (Polyvinyl Chloride) Standard toilets have a rough-in of 12 inches, while non-standard toilets have a rough if of 10 or 14 inches. The rough-in is the distance between the rear finished wall and the center of the drainpipe.Toilet flanges are also known as closet flanges. This is because flush toilets were commonly called water closets in the past. Old Toilet flanges are made of cast iron, but modern ones are made of PVC or ABS. A hole saw is my personal go-to for cutting flange holes, especially in plywood or OSB subfloors. Just attach the hole saw bit to your power drill and let it bore through the subfloor. Knowing these critical measurements will ensure your flange hole ends up in the ideal position for toilet installation success! Sealing and Protecting the Flange In general, the best practice is installing the toilet flange above the finished floor of your bathroom. It’s best to ensure the new flange is installed correctly and sits flush with the floor to prevent future problems.

This is a PVC flange that has a rubber gasket around it. The rubber gasket completely seals the inner diameter of the waste pipe; you do not need glue. Push-titeLast, but not least, is the aluminum type. It’s light, corrosion-resistant, and sturdy. Used to make primarily the wax metal ring, but can also make the entire flange. Also called a Sawzall, these small power saws are perfect for subfloor holes. The long blade lets you plunge in and cut out a circle rapidly.

In most cases, it is the wax ring that needs replacing if your toilet leaks at the bottom. But to be sure, remove the toilet to inspect both the flange and wax ring. They are best utilized on drain pipes located lower than the subfloor. They come with an elongated pipe made to fit even deeper into the drainpipe, what they call a deep-body cast iron flange. Designed for drainpipes existing beneath a toilet’s sub-floor, cast iron flanges can sometimes be repaired instead of replaced, depending on how serious they are damaged. The major difference between ABS and PVC flanges is that ABS pipe contains a chemical called bisphenol A (BPA) that strengthens it. This makes it quite durable and better at dealing with very bulky waste. EZ-Flo ABS Closet FlangeBefore you go ahead and choose the size of the toilet flange for your 4-inch pipe, it is essential to measure the existing flange correctly. Accurate measurement is an essential aspect to determine the size of the toilet flange you need. Here are some tips that you must follow to measure the size of your current toilet flange. If the toilet flange isn’t level, always try to correct the issue before installing the toilet to prevent any possible leaks and ensure a proper fit of the toilet. All pipes and materials associated with the new work must meet all applicable code standards at the time of the change. It all depends on laws regulations of the state where you reside Besides the spacers I didn't use, the kit comes with small, slightly spongy shims for any wobble. I used a couple of thin ones to make the base of the toilet super solid before I tightened it down. I didn't use the spacers. Also, you can attempt to use a flange extender to raise the flange to the correct level, which is usually 1/4 inch above the ground level.