Commercial Plumbing Along the Orangethorpe Corridor

Big footprints, long runs

Along Orangethorpe Avenue, commercial buildings tend to be large and spread out: shopping centers with rows of suites, standalone restaurants with drive-throughs, and industrial and warehouse buildings on wide lots. Most sit on concrete slabs with long drain runs to the street.

Long runs under slab floors and parking lots make plumbing problems harder to reach. A backup in the far suite of a center may trace to a lateral that runs the length of the building, and a supply leak under a warehouse floor can go unnoticed until the water bill climbs.

Typical plumbing conditions

Buildings: Shopping centers, standalone restaurants, industrial and warehouse buildings from several eras
Foundations: Slab-on-grade is typical
Sewer laterals: Often long and shared; material varies with building age
Trees: Parking lot and street trees can send roots into older joints
Water: City of Fullerton water utility; hard water
Gas: SoCalGas

Common issues by building type

Building type	Common issues
Multi-tenant shopping center	Shared lateral backups, grease from food tenants, unclear responsibility
Standalone restaurant	Floor sink backups, interceptor service, water heater capacity
Industrial or warehouse	Under-slab supply leaks, floor drains drying out, backflow on process connections
Office or medical suite	Restroom flush valves, water heaters, hidden leaks

Worth doing in large slab buildings

Map every clean-out, including ones under parking lot covers.
Run the after-hours water meter test periodically to catch hidden leaks.
Prime unused floor drains to keep sewer gas out.
Camera-inspect long shared laterals on a schedule.
Keep backflow test records for every assembly on the property.

Questions for property managers on Orangethorpe

How long is our lateral, and which suites share it?
Where are the clean-outs, and are any paved over?
When was the line last camera-inspected?
Which backflow assemblies are on the property, and when were they tested?

Map of Orangethorpe Avenue corridor. It shows an area, not an office or a job site.

Common questions

Why do backups show up far from the cause in big centers?

Wastewater rises at the lowest open drain on a blocked line, which may be in a different suite from the one producing the grease or debris.

Are under-slab leaks common in warehouses?

They can happen in any slab building. Large floors make them harder to notice, so meter tests and water bill tracking help.

Do industrial buildings need backflow devices?

Many do, especially on process or chemical connections. Check with the City of Fullerton water utility for your property.

General information for Fullerton, not a quote or professional advice. In an emergency, call 911.