Backwater Valve Installation in the South Bay
City requirement or a downstairs drain that floods when the street surcharges? Request a backwater valve estimate.
Schulze Plumbing Inc. provides Backwater Valve Installation in the South Bay / Los Angeles County area. See cities we serve or call 310-487-2975.

A backwater valve is a one-way fitting on the building sewer. It is for properties where the public sewer can surcharge into low fixtures. It is not a substitute for a working lateral, and it needs a cleanout so it can be serviced.
Some South Bay remodels and downhill lots trigger this in plan check. We install to the approved drawing, not as a mystery box in the yard.
Common symptoms
- Lower-level drains that overflow when it rains or the street main is stressed
- A plan-check correction calling for a backwater valve
- A prior flood from the sewer, not a clogged toilet
What this service involves
- Siting the valve with access
- Installing on the correct side of the system
- Explaining maintenance so it does not stick shut or open
Get My Backwater Valve Estimate
Share photos, fixture ages, and your ZIP. We’ll follow up about an estimate for the work you approve.
Process
- Share whether this is a city requirement and which fixtures are below the next upstream manhole, 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 We do not publish prices on this page.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
- Will this stop all backups?
- It is aimed at backflow from downstream. A clog inside the house is a different problem.
- Does it need maintenance?
- Yes. Debris can hold it open or shut. Access is part of the design.
- Is it required?
- Sometimes by code or city comment. We install when specified or when the plumbing condition calls for it.
Related services
Areas we serve
South Bay beach cities, the Palos Verdes Peninsula, Torrance, and nearby inland cities. Share your ZIP so we can confirm coverage.

