How to Replace a PVC Toilet Flange Part 2

What You'll Need
Pipe Cutter
Measuring Tape
PVC Glue
Screws and Shields
High Pressure Drill

When a pvc toilet flange is not properly sealed it can cause a leak. This can be tricky as the normal adhesive holds the flange in place very tightly. This piece is found where the sewer line connects to the bathroom floor. Replacing this flange also requires replacement of the elbow joint that is used for the connections. Once a leak is found it is best to fix it as quickly as possible.

Step 1 – How to Cut the Pipe to Floor Level

The length of the new piece of sewer line should be the distance from the inside bend of the new sewer elbow joint and about halfway along the coupling. Cut the sewer piece using a pipe cutting tool or a hacksaw. If any burrs are left remove them with a pipe knife. The ends of the pipe should be as smooth as possible for a tight and leak free fit. Ultimately this entire set up should be flush with the floor. Before gluing anything into place, put it together to ensure that it is not sticking out above the floor.

Step 2 – How to Attach the Flange to the Pipe

It is common for the flange to be glued to the pipe. PVC glue is the traditional way of attaching this to the sewer pipe. For an incredibly secure connection there are screws and shields that can be used to attach the flange into place. A hardware store will have all of the pieces needed to attach the flange. Normally screwing in the flange will require a high pressure drill because the sewer pipe maybe made of metal. Improper drilling can cause leaks and the right PVC glue will do the job.

Step 3 – How to Secure the Flange to the Floor

With the new sewer pipe and elbow joint in place, it is possible to mount the new flange into the floor. Many times screws will mount this into place or bolts. Put the bolts into place but do not attach the washers or nuts yet. Place the wax rim on the bottom of the toilet and gently push the toilet into place over the new flange. Ensure that the toilet is level. Make sure the toilet is lined up with the flange. Once the toilet is firmly in place, add the washers and the nuts to the flange bolts and tighten.

Mistakes to Avoid

One of the major mistakes which can cause problems is incorrectly removing the old flange. If the old flange is not removed properly then the new flange will not be able to properly seal with the pipe. Another issue is not leveling the toilet. When the toilet is not level it can rock and this can cause the flange to crack. Make sure the toilet is level and the bolts properly tightened. One of the biggest problems is when individuals do not buy the correct sized flange. Leaks and nasty odors will escape the toilet if the flange is the wrong size. Measure the diameter of the toilet and waste pipe to ensure that the new flange is the proper size.