Restaurants, salons and apartment buildings

Commercial drain cleaning differs from residential work in three ways that matter. The lines carry far more of the material that blocks them, so a build-up that takes a family five years takes a busy kitchen five weeks. Failure closes a business or displaces tenants rather than inconveniencing one household. And the pipe is usually shared, so the question of who is responsible has to be settled before anyone starts. Done properly it is scheduled work rather than emergency work, cleaned on an interval set by what a camera showed and not by when it last backed up.

A restaurant line is a grease line

Fats, oils and grease leave a commercial kitchen dissolved in hot water and arrive in the horizontal run cool. That is where they come out of suspension and stick, and every wash cycle after adds another layer. A grease interceptor catches what passes through it, but plenty never goes through one: a mop sink, a hand sink, a floor sink under an ice machine, a dishwasher discharge on a run the interceptor does not serve. The line that fails is usually the one nobody counted.

Cabling a greased line makes an opening through the middle of it. Service resumes, the staff stop complaining, and the layer on the wall keeps thickening around that hole until the same call comes in a month later. High pressure water on a rotating nozzle does something different. It strips the wall back to the material the pipe is made of and carries the debris away instead of punching past it. On a grease line that is not an upgrade, it is the only cleaning that changes the interval.

Salons put three difficult things in one bowl

A shampoo bowl takes cut hair, colour and bleach product, and the wax from other services if the same sink gets used for cleaning up. Hair alone forms a mat at the trap. Hair with conditioner and colouring product forms something denser that grips the pipe wall. Wax rinsed warm sets hard in the first cool section it reaches and does not soften again in normal use. A salon open a few years that has never had the bowl branch cleaned generally has a restriction starting within a few feet of the bowl and continuing.

The practical answer is a strainer in every bowl emptied through the day rather than at closing, and a scheduled clean of the branch rather than a call when a bowl stops. Where several stations share one horizontal run, the station furthest from the stack reports the problem first, which is often not where the blockage actually sits.

Multifamily: the stack, the branch and the lateral

In a building with units stacked above one another, the symptoms tell you which pipe is involved. One unit affected on its own is that unit’s branch. Several units on the same vertical line, with the lowest one worst, is the stack. Every unit in the building, with water appearing at the lowest fixtures anywhere on the ground floor, is the building drain or the lateral. Getting that wrong wastes a morning cabling a fixture in a unit that was only reporting somebody else’s problem.

Wipes are the recurring cause in rental housing, and no amount of signage has ever fixed it completely. What does help is a camera run after each clearing, so the manager knows whether the line is being blocked by what tenants flush or by a defect in the pipe itself. Those are different problems with different answers, and only one of them is solved by a notice in the laundry room.

Who owns the pipe once it leaves the building

In Costa Mesa the sewer authority is the Costa Mesa Sanitary District, and the property owner owns the lateral all the way to the point of connection with the district main, which is normally under the middle of the street. For a commercial building or an association, that is a meaningful length of pipe running under the parking area, the kerb and the road surface. CMSD runs a rebate programme covering a CCTV inspection of the lateral or the installation of a ground-level cleanout. For a property with no accessible cleanout, that second option is worth pursuing on its own merits.

What a scheduled programme looks like

Access decides how the day goes

The biggest single variable in commercial drain work is whether there is a proper cleanout. With a two-way cleanout at grade, a technician can work both directions from a known point and be finished before service starts. Without one, the entry is a roof vent, a pulled toilet or a fitting broken into inside the building, and each of those adds hours and mess. If a building has no accessible cleanout, installing one is usually the most useful thing an owner can do before the next blockage rather than after it.

Film it after, not only before

A camera run before the work tells you what to do. A camera run after tells you whether it worked, and it is the one people skip. On a grease line the after footage should show the wall of the pipe, not a channel through a coating. On an older cast iron building drain it will show how much diameter corrosion has already taken, which is the information an owner needs in order to plan rather than react. Keep the recordings, because three years of them become a maintenance history.

Where we work, and where we do not

This is an Orange County business. Vans dispatch from Costa Mesa, and the service area runs from Newport Beach at under two miles out to San Clemente at twenty-three, taking in Huntington Beach, Fountain Valley, Irvine, Santa Ana, Tustin, Orange, Anaheim, Mission Viejo and Fullerton along the way. We do not cross into Los Angeles County. If a long drive is going to affect the time we can be on site, we say so when the call comes in rather than afterwards.

One question worth asking any contractor before a commercial arrangement is agreed: what will the interval be after the first camera survey, and what would make it longer. If the answer does not depend on what the footage shows, the schedule is not being set by the pipe.