Storm & Drainage in the South Bay
Standing water, a leaking roof drain, or a patio that has nowhere to go — request an estimate with photos of the wet area.
Storm and drainage plumbing moves rain and wash-down water off roofs, decks, and paving so it does not sit against stucco, crawlspaces, or a neighbor’s slab. That is a different system from the sanitary sewer, even when both are underground. Mixing them is a code problem; ignoring a clogged roof drain is a ceiling-stain problem.
Peninsula and beach-city buildings add overflow drains, scuppers, and tight side yards. Mid-century Torrance pads may have area drains that silted in or catch basins that no longer meet the driveway. Multi-unit buildings need roof-drain bodies and leaders that can be maintained — not a mystery pipe in a chase.
This category covers roof drain install/replace, overflows, deck and area drains, storm piping, underground drainage, catch basins, repairs, and site drainage plumbing. Landscape grading without piping may still need another trade; tell us what you already have in the ground.
Who this is for
- Buildings with ponding on a roof, deck, or driveway
- Owners replacing failed roof-drain bodies or leaders
- Projects adding area drains or catch basins
- Anyone repairing broken underground storm piping
Common symptoms
- Water at a sliding door, planters that never dry, or a garage that sheets water inside
- A roof drain that overflows into a ceiling or wall
- A catch basin that stays full days after rain
- A deck drain that rattles, leaks below, or was never tied to a leader
What this work involves
- Separating storm water from sanitary sewer unless a legal combined condition already exists
- Installing or replacing drain bodies, piping, and overflow paths
- Setting basins and underground runs with cleanable access where the design needs it
- Repairing failed sections without guessing at the discharge point
Get My Drainage Estimate
Tell us the rooms, fixtures, or equipment involved and your ZIP. We follow up about an estimate.
Storm & Drainage services
Roof Drain Installation
New roof drain bodies and leaders for flat or low-slope roofs — plumbing side, not the membrane.
Roof Drain Replacement
Replace failed roof drain bodies, clogs that are actually broken drains, and rotting leaders.
Overflow Drain Systems
Secondary roof drains or scuppers that carry water when the primary drain clogs.
Deck Drains
Drains for elevated decks, balconies, and podium slabs that leak into living space below.
Area Drains
Yard, patio, and hardscape drains that collect standing water at grade.
Storm Drain Piping
The underground or in-wall piping that carries storm water from drains to discharge.
Underground Drainage
Buried drainage assemblies: laterals, combinations of drains, and subsurface collection that is still plumbing.
Catch Basins
Grated basins that collect runoff and drop debris before it enters storm piping.
Drainage Repairs
Fix broken storm piping, settled basins, leaking leaders, and failed deck drains.
Site Drainage Plumbing
The overall site rainwater plumbing: drains, piping, and discharge as a coordinated system.
Process
- Share where water collects, whether it is a roof, deck, or yard, and any existing drain locations, plus your ZIP code so we can confirm South Bay coverage.
- We follow up to confirm access, scope, and whether permits or other trades may be involved.
- You receive an estimate for the work you approve. We do not publish prices on this page.
- After you approve, we schedule the job.
FAQ
- Is a roof drain a plumbing job or a roofing job?
- The drain body, overflow, and piping are plumbing. Roofing membranes and flashing around the drain often involve the roofer. We coordinate rather than claim roofing work.
- Can you tie storm drains into the sewer?
- Not as a convenience. Storm and sanitary are separate systems. If an inspector or existing condition says otherwise, we address that on the estimate — we do not improvise a cross-connection.
- Do you hydro jet storm lines too?
- Storm piping can be cleaned when access exists. Roots, silt, and collapsed pipe still may need repair. See sewer & drain for sanitary cleaning methods.
Related categories
All plumbing service categories
Areas we serve
South Bay beach cities, the Palos Verdes Peninsula, Torrance, and nearby inland cities. Share your ZIP so we can confirm coverage.