Toilet post.
I did not do as well for pics here because the work was messy, I was tired and it turned into a bit of a fiasco.
Quick summary of work to be done:
- Install new flange in floor
- Connect to old plumbing
- Put new bolts in flange
- Put wax ring on flange
- Install toilet
In reality, these are the steps I took:
- Cut pipe from basement
- Glue 3" coupler, using ABS to PVC cement
- The plan was to install a new PVC flange, glue a piece of PVC into it, and slip that into the coupler. We changed plans and I will explain later.
- I had the tile guys tile up to the old ABS flange. The plan was to drill holes in the new tile and concrete so the screws could bite into the plywood subfloor. This plan was complicated by the fact that the pipe was much closer to one side of the hole than the other. Below the front section, there was pretty much just air. Nothing for a screw to bite into. So with the tile overhanging the hole, I figured the flange could rest on that. Then we would add plywood below the screw.
- So we laid the new PVC flange on the tile, lined it up with the pipe below and were going to mark the holes when...we realized the new flange was kind of thick. You are supposed to install the flange to be flush with the finished floor, not above. So we went back to the store to get a different flange style. This was still PVC, but instead of being 100% PVC, it had a stainless steel ring around it with holes for mounting, and the johnny bolt slots. It was a little thinner. The issue is, the bottom of the toilet may not accommodate a tall flange + squish a wax ring. So the concern is the toilet may not get all the way to the floor. But I did some research on this and apparently this isn't as big a deal as we thought. Based on my research, plenty of guys install the flange on top of the new floor. The real danger is when the flange is BELOW the floor. That's when you have problems. But flush or a little above is not an issue. So we continued with the new flange.
- We lined it up and marked the holes. Instead of drilling, which we decided would be incredibly difficult (porcelain tile is HARD, HARD stuff), I decided to break out the 4-1/2" angle grinder. I got out the ear and eye PPE and went to town. I used up at least an inch of the grinding wheel and it made an incredible mess, and odor. I had to switch to a thin grinding disc and it took many attempts to grind the tile down to where the screws would have a clear shot through the floor.
- After all that mess and noise, I switched to concrete drill bits to drill through the poured concrete floor. This was a pain but easier than grinding the tile. Eventually, we had a clear shot with each of the six mounting screws straight down.
- Because the pipe is offset in the hole, we had to make up a new piece of plywood to fill in the hole. That way the screws had something to bite into. Without this, half of the screws wouldn't do anything.
This pic is of everything done, but from the bottom up:
Original ABS pipe, PVC coupler (green glue), PVC pipe, and that goes into a 3" furnco (will get to this later).
The point is, this shows the plywood filler piece we made. It is secured nicely to the subfloor above with 1-1/4" Deckmate screws (my favorite). Notice how it fits tightly around the furnco.
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The flange from the top. I would fit this up, try to put screws in it, and determine where I needed to keep grinding (or drilling the concrete). Hence the pencil marks in the floor. Yeah, this part was a royal pain.
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I guess this is a good time to introduce the next issue that happened when we switched flanges. The original plan, again, was an all-PVC flange with a 3" pipe glued in. We had that measured, cut and glued up. When we realized that flange may be a bit too thick, we switched to this one. Except instead of accepting a 3" pipe, it had an outlet the SAME SIZE as a 3" pipe. WTF! Hence the furnco. So what you see here, is the reverse of the stackup I went over before, which is:
Top flange, furnco (outside), PVC pipe, PVC coupler (outside), original black ABS pipe.
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After all that, it was pretty painless. Here it is with the six mounting screws (I had to use 4"!!), and the johnny bolts installed.
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Then put the wax ring on (I got one with the built-in reinforcement and sort of a funnel to better mate with the flange pipe in the floor). Next drop the toilet down and tighten the nuts. I worked them evenly until they stopped. No issues. I still had to shim the bottom, despite my hope that the larger tiles would have provided a leveling effect at the toilet.
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Shims. I had to do this when I first put these new toilets in last April so I was used to the procedure. Just shove in without actually bringing the toilet up. I score it with a utility knife, then remove, score more and break off (a vice works nicely). I probably put like 8 in, so the toilet would be evenly supported. This detail is critical, as it prevents toilet rocking, which can affect the wax ring seal and lead to leaks. It is worth it. I used composite shims which are strong and will not rot.
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We probably spent the entire afternoon Saturday into the evening just getting the flange situated. And didn't drop the toilet on until Sunday morning! But it is done and everything works with no leaks. I'm a little disappointed about the furnco (rubber coupled with worm gear clamps) but my father-in-law assures me they are good. Onto the vanity.