How to fix an off-center toilet drain during a remodel
An off-center toilet drain caused by miscalculated measurements can be corrected using an in-pipe cutoff saw and an offset flange. This allows you to adjust the pipe position without tearing up the subfloor or failing plumbing layout constraints.
What the numbers show
Counted from the threads quoted below. How we count
- The most recent one is from October 2026.
- This comes up 19.2× more often in r/Plumbing than across the site as a whole.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Using an in-pipe cutoff saw and an offset flange secured with vinyl concrete patchDid this help you?
- 2Consulting a plumber to evaluate alternative installation optionsDid this help you?
- 3Buying multiple different sizes of trap adapters to see which one fitsDid this help you?
- 4Using voice-to-text to communicate details and measurementsDid this help you?
- 5Using a proper slip joint extension and a new p-trapDid this help you?
- 6Cutting out flexible pipes and using rigid plasticDid this help you?
- 7Using longer hard pipesDid this help you?
- 8Adding an extension or a 22-degree/45-degree fittingDid this help you?
- 9Using tubular 90-degree elbows to align the trapDid this help you?
- 10Using flexible drain kits like a Snappy trapDid this help you?
- 11Waiting for a professional plumber to become availableDid this help you?
- 12Asking online plumbing forums for advice on how to fit the pieces togetherDid this help you?
- 13Using silicone instead of putty to help lift the drain to meet the bottom of the shower panDid this help you?
- 14Proceeding with the installation and waiting to see if it leaksDid this help you?
- 15pushing the pipe to center when setting the drainDid this help you?
- 16cutting the shower pan to the appropriate sizeDid this help you?
- 17using a street fitting and regular offsets to correct the riserDid this help you?
- 18Rotating the P-trap or tee by cutting the vertical pipe and reconnecting it with a coupling.Did this help you?
- 19Keeping the tub out of use until the repair is completedDid this help you?
- 20Applying thinset, wet setting the soap holder, and using siliconized grout caulkingDid this help you?
- 21Planning to completely replace all the tile in the futureDid this help you?
- 22Building a false wall or pony wall to hide the pipesDid this help you?
- 23Chipping concrete to push the lines back or into the wallDid this help you?
- 24Building out a shelf or ledge for storageDid this help you?
- 25Raising the shower pan or adding a benchDid this help you?
- 26Placing the trap directly under the sink and lowering the horizontal drain armDid this help you?
- 27Running the tailpiece over toward the stub out first and placing the P-trap near the wallDid this help you?
- 28Setting the new vanity, putting the trap in place, measuring the height, aligning everything without gluing, cutting all the pieces, and gluing them at the end.Did this help you?
- 29Redoing the plumbing configuration with a longer tailpiece and a standard P-trap kitDid this help you?
- 30Opening the wall to adjust the drain arm and add an air admittance valve (AAV)Did this help you?
- 31Starting over from scratch with new piping kitsDid this help you?
- 32Rotating the garbage disposal unit to change the discharge angleDid this help you?
- 33Swiveling the elbows to make the straight pipes connectDid this help you?
- 34Forcing components into alignment or adding extra 90-degree slip joints to bridge gaps.Did this help you?
- 35Trying to use a rubber washer in the coupling nut to stop the leak without fixing the underlying pipe misalignment.Did this help you?
- 36Cutting the sliding shelf to accommodate the trapDid this help you?
- 37Cutting off some length of the P-trap waste arm and rotating the vertical tubeDid this help you?
- 38Replacing the scabbed-together parts with a matching manufacturer waste half-kitDid this help you?
- 39Throwing out the incompatible screw-in faceplate for the correct expanding designDid this help you?
- 40Pulling the unit slightly out of position to force it to connect with an extender.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“We are DIY-ing our shower and found this under the previous shower pan. We are putting in tile, so we need to do something about the lines coming out of the floor. Would you recommend a plumber move these, is this DIY-able, or should we put a little step/frame situation to cover it and not move it?”source ↗
“Is grabbing two 45’s a bad idea? I installed a new sink for my mother and based on the depth being different and the drains both being further back than the prior sink.. some modifications need done here.”source ↗
“If that absolutely is the way to fix this I will, but would prefer not to.”source ↗
“Putting in new vanity and this is the plumbing when I removed the old ones.. not feeling too great about it”source ↗
“when i did my bathroom i had the same situation, the flex always get gunked up and start smelling after a while”source ↗
“Does the P trap have to be attached to the down drain of my sink?”source ↗
“I am trying to avoid those flexible drains while maximizing the space underneath my new sink.”source ↗
“I got a new sink and can’t wrap my head around making a p trap work here.”source ↗
“My question is, when I redo, where does p trap go?”source ↗
“Does it need to go directly under sink drain like it is now and then have tail piece run over to stub out? Or should I run over towards stub out first (like in 2nd picture), and then place p trap directly near stub out? Or does it not matter?”source ↗
“The waste pipe comes straight out of the wall and I’m about a half inch off. I’m able to force it as shown in photo 2 but that doesn’t seem right. And maybe the slip joints won’t hold.”source ↗
“For a new garbage disposal and sink. I had a mid alignment by around half an inch. I can pull the disposal by that distance and connect with my extender. Is this going to cause an issue”source ↗
“We’re in the middle of a remodel and had to move a toilet. Unfortunately measurements were off and the toilet is about 1.75” off center.”source ↗
“I needed to move an existing toilet about 1 1/2". I used an in-pipe cutoff saw to cut out the existing flange above 2" below the finished floor and then installed a Sioux Chief pushtite offset flange.”source ↗
“I'm not sure if I should be pulling one of the two pieces already in the wall out and replacing them or just screw that chrome on there and put the p-trap inside or what.”source ↗
“Part of the thing is I'm not sure if I'm supposed to keep everything on there the way it is or if something's come out supposed to come off and get replaced or....”source ↗
“New vanity going in, but I have limited options with moving the piping.”source ↗
“I'm installing an acrylic shower and I've set the drain a little bit low.”source ↗
“When I complete the assembly, I can't tell if the gasket is probably compressed or not, but I'm guessing it's not.”source ↗
“Are there spacer rings or thicker gaskets that can be used here to fill the space a bit more so I can be sure?”source ↗
“Adjusting the height of the drain would be a terrible task at this point.”source ↗
“The first one is glued offset? It will work but is not perfect.”source ↗
“I changed the bathroom sink drain, and having issues with leakage down at the J bend towards the wall.”source ↗
“Second potential jarring reason is the alignment roughly half inch off at j bend, but I did manage to screw on that nut to connect.”source ↗
“Is the vertical tube aligned with the drain right now?”source ↗
“I haven't put the sinks on yet would that be the next step to see where it aligns?”source ↗
“The cover plate they placed has a screw hole but they used silicone to attach it to the overflow pipe”source ↗
“After cutting the hole, the pipe is heavily towards one side. I can push it about 1.25 inches to center when setting the drain, but I’m unsure if this is okay.”source ↗
“Put in a wet bar sink on top floor of house. The rough-in plumbing had that original 90 degree angle up to a vent. Thought it was just a cap at first. Wondering now if I need to redo and put in a vent?”source ↗
“After taking it apart to clear a clog I am now convinced it’s literally impossible for it to have ever been connected in the first place.”source ↗
“Can/should I fix this or should I just start from scratch?”source ↗
“Flipped home, plumbing not up to code. Builder attached bronze faceplate w some kind of clear epoxy around edges. Epoxy had mold so I had to remove face plate. Realized they should have used a gasket (or, happy to know what they should have done). Want to DIY this the right way.”source ↗
“I disconnected three pieces I can assure you this is where they all came from”source ↗
“What's left exposed is like a wire base and a type of grey cement looking thing. I need to fix this obviously.”source ↗
“Can you tell me literally exactly what to buy from Lowe's/home depot? Im so out of my league here”source ↗
“For now my main concern is how to make the shower usable again, because my teenagers using my bathroom is killing me 😭”source ↗
Where this came up
People with this problem also raised
- 6Toilet rocks or moves slightly - how to fix
- 31How to fix a stripped or jammed shower handle
- 5How to vent a relocated plumbing sink or drain
- 7Can you put a 4-inch faucet on an 8-inch sink?
- 2Converting a bathtub to a shower with a 1 1/4 inch drain
- 8Why does my basement sink gurgle when the kitchen sink drains?