Why Does Cast Iron Sewer Pipe Fail Under a Maitland Slab?
It rusts from the inside, and it does it unevenly. The bottom of a horizontal drain line sits wet every time somebody in the house runs water, so that is the surface that thins out first while the crown of the pipe still looks sound from a distance.
On a camera you see the result: a channel worn along the invert, scale hanging off the walls like coral, and joints that have opened up. Once a joint is open, sand starts coming in. That is the part homeowners never picture. The soil around the pipe migrates into it a grain at a time, and the line silts up faster than any cleaning can keep ahead of, which is why a drain like this one clears for a few weeks after every cabling and then comes straight back.
Cast iron was standard under Florida slabs until PVC took over through the 1970s, so it is the older Maitland streets where we run into it. This house had reached the point where cleaning was buying weeks instead of years. Herrell Plumbing has been doing this work across Orange and Seminole Counties since 1970, and it is a routine part of plumbing in Maitland.
How Do You Reach a Sewer Line That Runs Under the Floor?
You cut the slab. There is no clever way around a pipe that had concrete poured on top of it, so the real work is controlling what that costs the homeowner in dust and floor.
It starts with a camera and a locator, so the trench follows the pipe instead of hunting for it. The route gets marked straight onto the finish floor, which is what those lines across the tile are. Then the space gets sealed. Plastic goes floor to ceiling across the hallway, the saw runs with a vacuum hung off it, and a HEPA extractor stays running in the room the entire time concrete is coming out. Containment is not a nicety on this job. Slab sawing puts silica dust into every register in the house if you let it.
After that it is dirt work indoors. Break the slab, dig the trench, keep the spoil on plastic, set the new PVC to grade, test it, backfill, compact, and pour the concrete back flush. Grade is the part nobody sees and everybody feels later. A line re-laid a quarter inch off over twenty feet will still run, but it will not scour, and anything that does not scour collects. If a camera shows heavy scale but sound pipe wall, this is a drain cleaning job instead, and we will tell you that before anybody prices a saw.
Does the Line Out in the Yard Have to Come Up as Well?
On this house, yes. The pipe under the slab and the lateral running out to the city main went in the same week in the same material, so replacing one and leaving the other is half a repair on a full invoice.
The yard side is the easier half. A trench ran down the side of the house, tight against the wall, deep enough that a plate compactor sat down inside it to pack the bedding back. From there it turned and crossed the front lawn out toward the main. The digging within a few feet of the foundation is done by hand, because nobody wants a machine tooth anywhere near a footing, and this lot has mature oaks, which means roots and means slower.
Yards recover, and that is worth saying out loud to anyone dreading this. The bare strip in the front lawn photo is backfilled and compacted and knits back in over a season. Nothing about it is the conversation the tile floor is. Sewer replacement sits alongside the rest of our plumbing services, and it is usually the job people find out they need while calling about something much smaller.
What Does the House Look Like Once the Concrete Goes Back?
Like a house. That is the whole point of the last stretch of a job like this one.
New PVC stubs came up through the patched slab exactly where each fixture was going to land, capped and held while the floor went back over them. The living room took vinyl plank. The bathroom went to a grey plank tile, and once the finish trades were clear, the vanity, the tub and the shower valve were set on those new drains and run through.
The clip here is that bathroom afterward. Double vanity on a white top, matte black trim throughout, a soaking tub against fluted grey tile, and a walk in shower with a hex mosaic floor and a slate coloured field. Nothing in the room suggests a trench ran through the middle of it a few weeks earlier, and that is the standard the restoration end of this work gets held to. A sewer replacement is judged on how little evidence it leaves behind.
The Job From Start to Finish
Same Drain Backing Up Again? Let's Put a Camera in It.
A camera tells you whether you are looking at a cleaning, a spot repair, or a line that has run out of pipe wall, and it tells you before anybody cuts anything. Call the shop at (407) 273-6260 and we will get one down there.