After a long time, we replaced our toilet last week. The old one didn’t work well for years and years!
We found these two videos helpful, showing in detail how to remove a toilet, replace the wax ring, and then, install the new one. The second video also comes with written instructions. The videos made it look quite straightforward, and so they were very encouraging; and it did work out quite well. It took just about 2 hours.
But here, I provide numbered steps, to follow along one-by-one, as a detailed plan. This way, you will always know what to do next—which can often be tedious, and the most challenging.
1. Empty space next to toilet, clean, etc.
2. Prepare space to lift old toilet to (Step 16)
3. Put new toilet in place to lift from
4. Flush (old) toilet
5. Wipe down toilet
6. Clean bowl, etc.
7. Turn water valve off
8. Flush until will not flush anymore (remember Step 7: water is disconnected)
9. Disconnect water hose
10. Plunge bowl
11. Sponge bowl dry
12. Scoop out water tank, sponge dry
13. Scrape off silicon connecting bottom of toilet to floor (if needed)
14. Lift lids of screws on the bottom / sides
15. Unscrew the bolts that fix the toilet to the floor
16. Lift toilet out
17. Remove the two bolts
18. Scrape out existing wax gasket
19. Clean floor which was underneath the toilet
20. Place new wax gasket
21. Place new bolts (upside down, on sides)
22. Lift new toilet into place. Make sure back is parallel to wall, level perpendicular and parallel to wall
23. Weight down to smoothe out the wax connection
24. Tighten new screws on bolts
25. Connect water, test flush
26. Cut off tops of bolts (saw)
27. Place lids on bolts
28. Connect new seat
29. Test flush
30. Clean up
This is an optimistic list; if anything goes wrong (e.g., at step 13, 18 or 29), you’re on your own. Our new toilet is just a one-piece, so I didn’t cover the case of a separate water tank.