Key facts: Emergency Commercial Drain Cleaning
- Henderson makes food businesses responsible for installing and servicing grease interceptors under Municipal Code 14.09, and each interceptor serves only one business [1].
- A grease interceptor slows kitchen wastewater so fats rise and solids settle before the flow reaches the sewer [2].
- Fats, oils and grease can harden in pipes into large blockages called fatbergs [3].
- Henderson adopts the 2024 plumbing code (UPC) carrying Southern Nevada's regional changes, and Plumbing permits come from the city's Building and Fire Safety department [4].
The dinner rush
When the floor sink fills at 7 p.m. on a Friday
A busy restaurant in Green Valley is two hours into a full Friday service. The dish machine drains, the three-compartment sink empties, and the floor sink under the prep line starts to fill instead of draining. Within minutes gray, greasy water creeps across the kitchen tile toward the cooks' feet.
That's the classic commercial drain emergency: a grease-heavy line downstream of the kitchen, overwhelmed at peak volume. It can sit in the kitchen branch, in the line to the grease interceptor, or in the interceptor itself if it's overdue for pumping.
For planned work and maintenance contracts, the standard commercial drain cleaning page is the place to start.
- Floor sinks or floor drains filling instead of draining
- Water rising in a mop sink when the dish machine drains
- Grease odor or overflow at the interceptor lid
- Restroom fixtures backing up in a shared building line
For the manager on duty
First steps for staff during a business backup
- 1
Stop the dish machine and sinks
Pause the dishwasher, close faucets at the prep and compartment sinks, and stop any equipment that discharges to the floor sink, such as ice machines or steam tables. Close the building's main shutoff if needed.
- 2
Protect staff and customers
Put out wet-floor signs, move staff away from standing water near electrical equipment, and keep wastewater away from food prep areas and storage.
- 3
Close affected restrooms
If restroom toilets are backing up, close them to the public and post a sign. Keep children, guests and service animals out.
- 4
Don't dump chemical products
Drain products don't dissolve a grease plug in a commercial line, and caustic water on a kitchen floor is a burn and slip hazard [5]. Mixing products can react.
- 5
Leave cleanouts and interceptor lids closed
Opening a cleanout or interceptor lid while the line is full can release a flood of grease and wastewater into the kitchen. The contractor will open them with containment ready.
- 6
Gather records
Have the last interceptor pumping date, the location of cleanouts, and any recent drain service notes handy for the contractor.
Other businesses
Commercial emergencies beyond restaurants
Office building restrooms
Several toilets on one floor backing up during business hours, often from paper towels or wipes flushed in a shared line.
Salons and barbershops
Shampoo bowls clogged with hair and product buildup in the middle of a booked day.
Retail and strip centers
A shared building line backing up into one tenant's restroom from another tenant's waste.
HOA clubhouses and pools
Locker-room showers and floor drains backing up during a weekend event or swim meet.
Clinics and dental suites in a crisis
Sinks or restroom lines backing up in patient areas, where closing rooms quickly matters.
Grease rules
Why do Henderson's grease interceptor rules matter during a backup?
The City of Henderson's pretreatment program requires restaurants and other food service businesses to fit and look after grease interceptors under Municipal Code 14.09, and each interceptor may serve only one business [1]. The locally adopted plumbing code also requires interceptors for grease-laden waste [4].
An interceptor works by slowing kitchen water so fats float and solids sink before the flow continues [2]. When it's full, grease passes straight through and coats the line downstream, where it hardens [3]. During a backup, tell the contractor when it was last pumped. The fix may be pumping plus clearing the line, not just clearing.
Recurring grease backups usually need more than a cable. Our page on emergency hydro jetting explains when a line needs scouring rather than a quick punch-through.
For a home rather than a business, see emergency drain cleaning for households.
Where it starts
Common commercial backup points
| Location | Typical cause | What to tell the contractor |
|---|---|---|
| Kitchen floor sink | Grease and food solids from dish and prep sinks | Which equipment drains there; last interceptor service |
| Grease interceptor | Overdue pumping; grease passing through | Interceptor size and location |
| Restroom bank | Paper towels, wipes, feminine products | How many fixtures are affected |
| Shared building line | Waste from several tenants converging | Whether other suites are affected |
| Mop sink | Debris and grit from floor cleaning | What's been poured down it recently |
The visit
What does an urgent commercial drain call include?
The independent contractor will want to see which fixtures are affected, then find the nearest cleanout downstream. In kitchens, they often start with a heavy cable machine through a floor sink or cleanout to restore flow, then talk through whether jetting or interceptor pumping is needed to keep it open through the next service.
Many restaurants prefer the contractor to work in a way that lets the kitchen reopen as soon as possible, so be clear about what you need running first. If any permit could apply to follow-up repairs, the contractor can tell you; Henderson Building and Fire Safety issues them [4].
Emergency commercial drain cleaning Henderson businesses request often uncovers a maintenance gap. Our preventative drain maintenance page covers scheduled cleaning that keeps the next rush from ending the same way.
FAQ
Business drain emergency questions for Henderson managers
Spoken questions about urgent commercial drain cleaning, answered briefly. Other topics: [master FAQ](/faq/). Back to [the full service list](/services/). Staff habits that prevent grease backups are in the [guide to what stays out of drains](/guides/what-not-to-pour-down-drains/).
Should a restaurant keep serving if the kitchen floor drain is backing up?
A restaurant with a backing-up floor drain should stop the dishwasher and prep sinks feeding that line. Many managers pause food prep until wastewater is contained, because sewage near food is a health concern. Check your health permit guidance for exact rules. Call to check emergency availability with a commercial drain contractor and keep staff out of the affected area.
What does a Henderson grease interceptor have to do with an emergency backup?
A grease interceptor slows kitchen wastewater so fats rise and solids settle before reaching the sewer [2], and Henderson obliges food service establishments to put in and keep up one [1]. When it is overdue for pumping, grease can pass into downstream pipes and harden [3]. Tell the commercial contractor you're connected with when the interceptor was last serviced.
Can an office restroom clog wait until after business hours?
An office restroom clog can often wait if the toilet is simply closed off with a sign, other restrooms work, and nothing is overflowing. Waiting is riskier when several restrooms share the problem or water reaches the floor of a tenant space below. Call to check emergency availability and ask whether an after-hours visit is possible to avoid disrupting customers.
What should my staff do while we wait for a commercial drain contractor?
Staff waiting on a commercial drain contractor should shut off water to the affected fixtures, rope off wet floors, and stop dishwashers or ice machines draining into the same line. They should not pour chemical drain cleaner into standing water [5]. Assign one person to meet the contractor and know where cleanouts, the interceptor and building plans are.
What information does a commercial drain company need on the first call?
A commercial drain company usually needs the business type, address, which fixtures are affected, whether it is a single tenant or shared building, and your access hours. Mention grease interceptor location and service history [1], roof or floor cleanouts, and anyone authorized to approve work. Ask how the visit is billed and whether they can provide documentation for property management.
Who is responsible if a shared building drain backs up into my shop?
Responsibility for a shared building drain backup usually depends on the lease, so notify the landlord or property manager first and photograph everything. On the public side, Henderson maintains the city main while property owners maintain the private lateral [6]. If water may be coming from the street, report it to Henderson Utility Services [7] and keep a written log of times and contacts.
Does emergency commercial drain work in Henderson need a permit?
Emergency commercial drain clearing usually does not need a permit, but pipe repairs or replacements often do. Henderson adopts the Uniform Plumbing Code with Southern Nevada amendments, and Building and Fire Safety acts as the permit office for plumbing work [4]. Ask the contractor you're connected with whether the planned work needs a permit and who will pull it before repairs begin.