Drain Pipe Repair and Installation
A clogged drain needs cleaning. A drain that leaks, smells, keeps clogging in the same spot or has cracked needs repair. Oasis Plumbers repairs and replaces the drain pipes inside and under your home – from a single leaking shower drain to a rotted cast-iron stack – and installs new drain lines when you remodel a kitchen, add a bathroom or build an ADU.
Camera inspection to find the failed section · Matching or upgraded pipe (ABS, PVC, no-hub cast iron) · Licensed plumbers
Clogged or broken?
| Sign | Clog | Damaged drain pipe |
|---|---|---|
| Slow drain that clears after snaking | ✔ | |
| Same drain clogs again within weeks | ✔ (crack, belly or rough cast iron) | |
| Water stain on the ceiling below a shower | ✔ | |
| Sewer smell from a cabinet or wall with no clog | ✔ (cracked pipe or dry trap) | |
| Damp floor next to a tub | ✔ (shower or tub drain seal) |
Drain line or sewer line?
Drain lines carry water from each fixture to the main stack and out under the house. The sewer line starts outside the foundation and runs to the street. Problems inside the footprint are handled here; anything from the outside cleanout to the city main belongs to sewer line repair.
Drain repairs we do
| Drain | Common failure | Repair |
|---|---|---|
| Shower or tub drain | Worn gasket or cracked drain body leaking into the floor | Replace the drain assembly, from below where there’s access |
| Kitchen sink branch | Grease-narrowed or cracked galvanized pipe in the wall | Replace the branch in ABS or PVC |
| P-trap and trap arm | Corroded or loose slip joints | New trap and arm, correctly sloped |
| Cast-iron stack or horizontal line | Cracks, rust-through along the bottom | Replace the section with no-hub couplings, or the full run |
| Drain under the slab | Broken or bellied pipe | Camera locate, then cut-and-replace or lining |
New drain installation for remodels and ADUs
- Moving a sink, shower or toilet to a new spot
- Adding a bathroom, laundry or wet bar
- ADU or garage conversion tied into the existing drain
- Floor drains and shower drains for curbless showers
We check the slope and the vent for each new drain, and that the existing line can take the extra flow. Bring your floor plan early – drains are far easier to route before framing and concrete.
What affects the price
- Access: open crawl space, finished wall, or slab
- Pipe material and length replaced
- Number of fixtures connected
- Permit, where required
Drain repair questions
How do I know if a drain pipe is broken and not just clogged?
A drain that clogs again soon after clearing, a stain on the ceiling below a bathroom, a sewer smell without a clog or a damp floor near a tub point to a damaged pipe. A camera inspection confirms it.
What is the difference between a drain line and a sewer line?
Drain lines run from fixtures to the main stack inside or under the house. The sewer line starts outside the foundation and carries everything to the city sewer.
Can cast-iron drain pipes be repaired?
A cracked or rusted section can be cut out and replaced with new pipe joined by no-hub couplings. When the whole run is thin, replacing it is more reliable.
How is a leaking shower drain fixed?
The drain body or its gasket is replaced, ideally from below through a ceiling or crawl space; otherwise from above with the right tools, without removing the shower pan.
Do I need a permit to add a new drain?
Adding or relocating drains is plumbing work that normally needs a permit in Los Angeles and Orange County cities, especially in remodels and ADUs.
What pipe is used for new drain lines?
Most new residential drains in Southern California are ABS or PVC plastic. Cast iron is still used where noise or fire rating matters.
Drain repair offices
Call the office closest to your home for a drain repair visit:
Los Angeles County
- Sunland — 8348 Foothill Blvd, Sunland, CA 91040 · (805) 883-6154
- Santa Monica — 701 Pico Blvd #551, Santa Monica, CA 90405 · (310) 818-7582
- Calabasas — 24025 Park Sorrento #430, Calabasas, CA 91302 · (818) 330-1138
Orange County
- Laguna Hills — 25272 McIntyre St #558, Laguna Hills, CA 92653 · (949) 635-7337
- Anaheim — 800 S Brookhurst St, Anaheim, CA 92804 · (714) 706-3926
Get the drain fixed, not just cleared
Tell us which drain is leaking or keeps clogging, and whether you’re planning a remodel. Call (888) 803-7895 or use the form.