Commercial Drain Cleaning and Sewer Maintenance

If it fails: the first hour

What the site contact should do before the technician arrives.

Stop using all fixtures that drain into the affected line to avoid worsening the backup
Contain any standing wastewater and keep staff and customers away from the area
Photograph the backup location and note which fixtures are affected
Call the drain service provider and specify whether this is a kitchen line, restroom line, or main sewer backup

What fails

Grease buildup in kitchen waste linesFats, oils and grease cool and solidify on pipe walls downstream of a grease interceptor that is undersized, poorly maintained, or overwhelmed, narrowing the line until it fully blocks.

Paper product and debris accumulation in restroom linesHigh-traffic restrooms accumulate paper towel and excess tissue in waste lines, especially at pipe transitions where flow slows down.

Root intrusion in underground linesTree roots find and grow through small cracks or joints in older clay or cast iron sewer lines, eventually restricting or fully blocking flow.

Mineral scale narrowing pipe diameterHard water deposits build up on the interior of waste lines over years, gradually reducing effective pipe diameter even without a single blocking event.

Grease interceptor overflow or failureAn interceptor that is not pumped and cleaned on schedule stops separating grease effectively, sending it downstream into lines that are not designed to handle it.

Floor drain backup at the lowest pointWhen a main line is blocked, wastewater backs up and surfaces at the building's lowest drain, typically in a mechanical room or kitchen floor drain, before it is noticed anywhere else.

Collapsed or offset underground pipe sectionsGround settling, old pipe materials, or nearby construction can crack or offset underground sections, creating a permanent restriction that repeated cleaning cannot fully resolve.

What a service call includes

Diagnostic assessment of the blockage location using camera inspection where the cause is not obvious
Mechanical snaking for localized blockages close to a fixture or cleanout
High-pressure water jetting for grease buildup or scale along longer line runs
Clearing and inspecting the grease interceptor if kitchen lines are involved
Camera verification after clearing to confirm the line is fully open, not just partially cleared
Checking for root intrusion or structural pipe damage if blockages are recurring at the same location
Written report with camera footage or photos and recommended follow-up if a structural issue is found

Preventive checklist

The items a maintenance program should carry for this system. Build a combined checklist across systems with the checklist builder.

Spring

Jet high-use kitchen lines ahead of any seasonal business increase
Camera inspect any line with a history of slow drainage from the prior year

Fall

Schedule grease interceptor pumping ahead of holiday season kitchen volume
Clear floor drains and check for slow drainage before winter when outdoor cleanup increases indoor drain use

Quarterly

Jet or snake grease-prone kitchen lines on a rotating schedule
Visual check of floor drains for slow drainage or odor indicating a developing blockage

Annual

Full camera inspection of main sewer lines to check for root intrusion, scale, or structural damage
Grease interceptor deep cleaning and structural inspection

What it costs

item	typical range	what moves it
Standard snaking service call	$150 to $450	Blockage location and accessibility from the nearest cleanout
High-pressure jetting, per line	$300 to $900	Line length and severity of grease or scale buildup
Grease interceptor pumping	$200 to $600	Interceptor size and how far past due the service is
Camera inspection with report	$300 to $800	Line length and number of access points
Root intrusion cutting and line repair	$500 to $4,000	Whether the fix is mechanical root cutting or requires excavation for pipe repair

National ranges. Local labor, access, after-hours timing and materials move them. Multi-site programs usually price below one-off calls.

When this is an emergency

A main line backup surfacing at a floor drain or fixture, especially in a kitchen or restroom that cannot operate until it is cleared.

How to choose a provider

Ask whether the provider has jetting equipment on the truck, not just a mechanical snake, for grease and scale buildup
Confirm camera inspection capability to diagnose recurring blockages rather than repeatedly clearing the same symptom
Ask about a scheduled jetting program for kitchen lines if the building has a food service tenant
Check whether they coordinate grease interceptor pumping or only handle the line clearing side
Ask about emergency response time for a backup that is actively shutting down operations

Questions

What is the difference between snaking and jetting a drain line?

Snaking mechanically breaks through a blockage with a cable, while jetting uses high-pressure water to scour the full interior diameter of the pipe, removing grease and scale buildup along the walls rather than just punching a hole through the clog.

How often should a restaurant grease line be jetted?

Quarterly is a common baseline for active kitchens, though high-volume operations sometimes need monthly service to stay ahead of buildup.

Why does the same drain keep backing up after being cleared?

Recurring backups at the same location usually indicate a structural issue, root intrusion, a pipe offset, or a section with a permanent low spot, that simple clearing does not fix, and camera inspection is needed to diagnose it.

Is grease interceptor pumping the same as drain cleaning?

No. Pumping removes accumulated grease from the interceptor itself, while drain cleaning addresses blockages in the piping. Both are usually needed together when kitchen lines are backing up.