Rust Streaks on a Cast Iron Stack
A brown streak or damp spot on a basement stack usually marks a crack or a hub joint that has started to weep. In an east side home from the 1950s through the 1970s, that stack is often original iron.
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OUR SERVICES
Repair and replacement for the drain piping inside and under Urbandale homes: building drains, basement floor drains, cast iron stacks, and joints beneath the slab. Open 24 hours.
OVERVIEW
Drain repair means fixing or replacing the pipe that carries waste inside and beneath a building, from fixture branches and vertical stacks down to the building drain under the basement floor. We at Clog Busters handle drain repair across Urbandale from our Des Moines branch, open 24 hours, and we put a camera in the pipe before we quote.
Urbandale requires a permit from the Department of Community Development before anyone begins the construction, alteration or repair of a building drainage system, according to Chapter 155 of the Urbandale Municipal Code. Maintenance such as stopping a leak or fixing a faucet is exempt. Cutting out and replacing a cracked length of drain is repair work, so we settle the permit question before anything is opened.
Urbandale housing splits by era. Census Bureau American Community Survey estimates for 2020 to 2024 count about 5,800 homes built from 1950 through 1979, concentrated on the older east side, while the northwest side is mostly built since 2000. Those eras used different drain materials, and they fail differently.
If the trouble is in the pipe running from the house to the public sewer, see sewer services in Urbandale. If a line is only blocked, start with drain cleaning in Urbandale. Our Urbandale plumbing page covers the rest.
Drain repairs in Urbandale fall under the City of Urbandale Plumbing Code, which adopts the State of Iowa Plumbing Code: the 2024 Uniform Plumbing Code, in force statewide since March 26, 2025.

SIGNS OF A FAILING DRAIN
These point to damaged pipe inside or under the house, not a simple clog.
A brown streak or damp spot on a basement stack usually marks a crack or a hub joint that has started to weep. In an east side home from the 1950s through the 1970s, that stack is often original iron.
Water seeping up around a basement floor drain can mean a broken joint under the slab, where the building drain meets the drain body.
A drain leaking inside a finished wall stays hidden until the drywall stains or the baseboard swells.
A steady smell near a stack, a cleanout plug, or a floor drain points to a cracked fitting or a failed joint letting sewer gas into the house.
When one bathroom or the kitchen still drains slowly after cleaning, a sag or a rust-narrowed section in that branch is the usual cause, not the main drain.
A line that blocks again soon after it was cleared has something catching debris: a belly in the under slab drain, an offset joint, or galvanized pipe closed down by rust.
DRAIN REPAIR SERVICES
Repairs to the drain, waste and vent piping inside the building and under the basement floor.
We cut out a cracked length of cast iron, support the stack above and below the cut, and join new pipe to the sound iron with shielded couplings.
Galvanized steel drain and vent lines rust from the inside until the bore closes. We replace the failing runs with plastic pipe approved under the plumbing code.
We open the basement floor only over the located break, replace the damaged section, and bed it in sand, which the city's plumbing amendments allow inside the foundation line.
A sag that holds water under the floor, or an offset hub joint, gets re-laid to proper slope instead of being cleaned over and over.
Cracked basement floor drain bodies and failed traps are replaced and reconnected to the building drain below the slab.
Weeping joints, split fittings and pinholes on exposed drain pipe, repaired before water reaches subfloor or drywall.
WHY CLOG BUSTERS
Find the failure, confirm the permit, replace the section, prove the result.
We run a camera through the drain from a cleanout and record the pipe material, the joints, and the distance to each defect.
A transmitter in the camera head lets us mark the defect on the floor or wall, so we open only the spot over the damage.
Urbandale's plumbing code limits work to what the permit lists, so the permit names the exact repair. If the opened pipe shows more damage, that work goes on a new permit.
We remove the failed section, connect new pipe at the correct slope, and bed any under slab pipe before backfill.
Permitted work stays open for city inspection before it is covered. We run water through the repair, camera it again, then patch the floor or wall.
FAQ
Still stuck? Call the Des Moines shop at (515) 259-1991.
Usually, yes, when pipe is being replaced. Chapter 155 of the Urbandale Municipal Code requires a permit from the Department of Community Development for the construction, alteration or repair of any building drainage system. Maintenance such as fixing a leak or a faucet is exempt. Replacing a cracked stack section or a broken under slab drain counts as repair.
A plumber holding a State of Iowa plumbing license can apply for one. The owner of an owner-occupied, single-family detached home can also get a permit for work in that home after showing the Building Official they are competent to do it and signing a homeowner's exemption affidavit.
The permit fee doubles. Urbandale's plumbing code doubles the fee when permitted work begins before the permit is issued, and the city fee schedule effective July 1, 2026 carries the same rule. Paying the double fee does not excuse the work from meeting code. The code also bars new permits on a property with unpermitted or noncompliant plumbing, except to correct it.
It depends mostly on when the house was built, and only a camera confirms it. Census Bureau estimates for 2020 to 2024 count about 5,800 Urbandale homes built from 1950 through 1979. Homes from that era commonly have cast iron building drains and stacks, sometimes with galvanized steel branch and vent lines. Most homes built from the 1980s on have plastic drain piping.
Often, yes. If the camera shows one cracked length or a leaking joint and the rest of the iron has solid walls, we cut out the damaged section and couple new pipe to the sound iron. Heavy scaling, a channel worn along the bottom, or cracks in several places point to replacing the run.
Only over the located fault. We mark the break from the surface first, then open a section of slab just large enough to reach it. Urbandale's plumbing amendments allow sand bedding inside the foundation line, and the new pipe is bedded before the concrete is patched.
Yes, within limits. Urbandale's plumbing amendments let a residential laundry tray used only for laundry waste drain over an open floor drain if the fixture sits no more than five feet from it. A standpipe for an automatic washer must be at least 36 inches above the floor. A floor drain that overflows when the washer empties may have a damaged trap or a restriction in the building drain.
Plastic drains do not rust, but they still fail at joints and where pipe under the slab has settled. Census Bureau estimates for 2020 to 2024 show more than nine in ten housing units in ZIP code 50323 were built in 2000 or later, so most drains there are plastic. Typical faults are a sag in under slab pipe, a joint that pulled apart, or a fitting damaged during a basement finish. A camera run shows which one.
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