Remodel Plumbing — Moving the Sink Is Easy. Moving the Drain and Vent Behind It Is the Real Job.
The island goes here. The toilet moves three feet left. Every line you redraw on that floor plan moves a drain, a vent, or a water line behind the wall — and that hidden layer decides whether the finished room works quietly for thirty years or gurgles at you from week one. We're Ultimate Plumbing, Oklahoma license #190465, based in Edmond, and the rough-in behind your remodel is the part of the job we care about most.
Find Your Remodel in This Table Before the Tile Gets Ordered
Every fixture you move drags pipe with it. Here's what each plan actually involves:
| Symptom / plan | What's really involved | What we do |
|---|---|---|
| The toilet is moving more than a few inches | A 3-inch closet bend and its vent both have to relocate; on a slab that means cutting concrete | Saw-cut the slab, re-route the drain at the correct fall, set a new closet flange, tie the vent back in |
| A kitchen island sink is in the plan | No wall behind an island means nowhere for a conventional vent to rise | Run an island loop vent, or set a code-legal air admittance valve with an access panel |
| The tub is becoming a walk-in shower | Tubs drain through 1.5-inch waste; a shower needs a 2-inch drain | Open the floor, upsize the drain line, set the P-trap where the new drain lands, water-test the pan |
| The new bathroom gurgles or drains slow since the remodel | A vent that never got connected, or a drain laid flat | Camera the line, find the miss, open the smallest possible section to correct it |
| Sewer smell in a freshly remodeled room | A trap that siphons dry because it was plumbed without a vent, or a flange that never sealed | Trace the gas path, set a proper vented P-trap, reseal the flange |
| You bought a flip and something feels off | Plumbing covered up without the rough-in inspection code requires | Pressure-test the supply lines and camera the drains before you trust the drywall |
Your Pinterest Board Doesn't Show the Vent Stack
You've put months into this remodel — layouts, three rounds of tile samples, a spreadsheet comparing faucet finishes. That's the fun part, and you've earned it.
Here's the layer the renderings never show: every drain in the house has to run downhill at a quarter inch per foot, and every fixture trap needs a vent close enough — code sets the distance — to pull air instead of siphoning itself dry. Move the sink and the trap arm moves. Move the trap arm and the vent moves. Move the toilet and a 3-inch closet bend comes up through the floor somewhere new — in an Edmond slab home, that's saw-cut concrete, not patched drywall.
None of that means your plan is wrong. It means the plan has a second, invisible layer, and the time to engineer it is before demo day. Bring us the floor plan. We'll show you which wall hides the vent stack, which moves are cheap, and which are concrete work. It's the first conversation we have on every construction and remodel job.
Unpermitted Plumbing Gets Buried, Then It Gets Expensive
Flippers and bargain remodelers run on one clock: days until listing. A plumbing permit means a rough-in inspection. A rough-in inspection means the walls stay open until the work passes. So the corner that gets cut, over and over, is the inspection: pipe gets buried, drywall goes up, and the listing photos show none of it.
The code is blunt: a drain-waste-vent system cannot be covered until it's been tested and passed rough-in inspection. That rule exists because of exactly what we keep finding behind flipped drywall in Edmond and Oklahoma City — drains sloped flat or run uphill, fittings that don't belong anywhere near a drain line, joints buried under slabs where no human can ever reach them again.
A permit isn't paperwork. It puts one person on your project — the city inspector — whose paycheck doesn't care how fast your walls close.
Camera First, Tile Last: How We Rough In a Remodel
We treat a remodel as three separate plumbing jobs, in a fixed order.
First, before anyone swings a hammer: we walk the plan against the real house and run a camera through the existing drains. If there's sixty-year-old cast iron under the slab, you want to know before new tile goes down, not when it fails under your finished floor.
Second, the rough-in. Drains re-routed in Schedule 40 PVC at a quarter inch of fall per foot — an eighth inch for 4-inch pipe — with sanitary tees pointed the right direction. Water lines moved in PEX-A with solid brass quarter-turn stops. If the toilet is moving, we saw-cut the slab, set the new closet bend, and pour the concrete back ourselves. Then we cap the system, put it under test pressure, and text the city for the rough-in inspection: request code 171 in Edmond, 6371 in Oklahoma City.
Third, trim-out. After the tile and paint are finished, we come back to set fixtures, connect traps, and run every drain at full flow.
That order is the whole secret. The $79 permit and a passed rough-in cost you a few days of schedule. An untested joint sealed behind a finished tile shower costs you the shower.
How a Buried Mistake Surfaces: The Two-Year Timeline
- Week one — the gurgle. A drain that talks while it empties is a trap starving for air. The vent never got connected.
- Month three — the slow drain. A line laid flat lets water crawl instead of carry. Solids settle and build a blockage that snaking only postpones.
- Month six — the cartridge. The bargain online faucet starts dripping, and its "lifetime warranty" turns out to have no phone number attached.
- Year one or two — the leak. The joint that was buried inaccessible finally lets go. You meet it as a ceiling stain, a warm spot on the floor, or a water bill that suddenly jumped.
- At sale — the inspection. The buyer's inspector asks for permit records that don't exist, and every dollar the flipper saved comes back across the closing table.
If you bought a house remodeled before you owned it and recognize this timeline, a camera inspection and pressure test now beat every later way of finding out.
Contractors Keep Us on Speed Dial
"Gage and his team are so thorough and great communicators. We have used them for new construction, remodels, hot water heaters and plumbing service work. Great work and fast response!"
"Gage the owner of ultimate plumbing has been awesome to work with. I use ultimate plumbing for all of my shower remodels. Very professional and great work highly recommend."
FAQ
Can I move my toilet during a bathroom remodel?
Yes — toilets get relocated all the time; the cost lives in the drain, not the toilet. A toilet needs a 3-inch drain and a vent within a code-limited distance, so moving it means relocating the closet bend and usually the vent connection with it. On a slab home that's a saw-cut and re-pour; over a crawl space it's under-floor work.
Do I need a permit to move plumbing during a remodel in Edmond?
If drains, vents, or water lines are being relocated — yes, in both Edmond and Oklahoma City. Swapping a faucet in the same spot isn't a permit job; moving a shower drain is. The permit buys you the rough-in inspection — the only independent check on work about to be sealed inside your walls.
How do you vent a kitchen island sink?
With an island loop vent inside the cabinet, or — where code allows — an air admittance valve. An AAV lets the trap pull air without running a vent through the roof, and it comes with hard rules: never sealed behind solid drywall, Teflon tape only on the threads, and no fixtures taking forced appliance discharge.
How can I tell if the flipper who remodeled my house did the plumbing right?
Start with the paper: search the city's permit records for your address — a remodel that moved plumbing should show a permit and a passed rough-in inspection, and no record is your first red flag. Then the physical tells: drains that gurgle, sewer-gas smell, supply stops that won't turn. We camera the drains and pressure-test the supply lines.
Why does my new shower gurgle after a remodel?
A gurgle is a trap fighting for air, and after a remodel it almost always means the vent didn't make the move. The new trap sits too far from its vent, the vent never got tied back in, or the drain was plumbed as an S-trap. The gurgle is annoying; the sewer gas that follows is worse. A camera and a smoke test find the miss.
When should a plumber get involved in a remodel — before or after demo?
Before the design is final, ideally. Once we see the plan against the real house, we can tell you which moves are drywall-cheap and which are concrete-expensive. After demo is workable. After tile is misery. The cheapest plumbing change order is the one made while the drawing is still a drawing.
Can the old tub drain be reused for a walk-in shower?
Usually not as-is. Most tubs drain through 1.5-inch waste, and a stand-up shower requires a 2-inch drain — a shower runs continuously, so code sizes the line for sustained flow. The P-trap also has to sit under the new drain location. The conversion opens the floor either way, so upsizing while it's exposed is cheap insurance.
Bring Us In Before the Demo Bar Swings
Call or text us at 405-519-1868 — with your floor plan, your flip-house suspicions, or the half-finished remodel that stalled when somebody found a surprise behind the wall. We'll look at what's really there, tell you what has to move and what doesn't, and you'll have the price before any work starts. Ultimate Plumbing — Oklahoma license #190465.