Restaurant Plumbing Checklist: Grease Traps, Floor Drains, and Hand Sinks
A restaurant plumbing checklist comes down to three systems that decide whether a kitchen keeps serving and passes inspection: grease traps and interceptors, floor drains, and hand sinks. Grease traps need scheduled cleaning and a paper trail, floor drains need clear strainers and full traps, and hand sinks need hot water, easy access, and a working faucet at every station. Edmond’s Rooter-Man Plumbers has served businesses in Tomball, Cypress, Conroe, and Northwest Houston since 1997, and our Texas-licensed plumbers verified by the TSBPE stand behind every commercial visit with BBB Gold Star accreditation, full general liability and workers’ compensation insurance, and 24/7 emergency availability. Use this checklist to keep your kitchen ready for the next health inspection, and call 281.351.4422 when a backup interrupts service.
Backup in your kitchen? Call Edmond’s Rooter-Man Plumbers at 281.351.4422. Licensed, insured, BBB Gold Star accredited, available 24/7.
Restaurant Plumbing Checklist at a Glance
This schedule works as a starting point. Your local rules, your equipment, and your kitchen volume set the real frequency, so adjust each line to match your permit and your inspector’s guidance.
| When | Task | Why It Matters |
|---|---|---|
| Every shift | Test each hand sink for hot water, soap, and towels, and keep the sink clear | Hand sinks must stay accessible, and the Food Code sets a minimum water temperature |
| Every shift | Empty and rinse floor drain strainers and baskets; scrape plates and pans before washing | Strainers keep food solids and grease out of the drain line |
| Weekly | Pour water into rarely used floor drains, check under sinks and around equipment for drips, and confirm the interceptor lid is reachable | Trap seals dry out, and small leaks grow when no one looks |
| Monthly | Review the grease trap log and walk the kitchen for slow drains, gurgling, and odors | Early signs show up long before a backup |
| Every pump-out cycle | Have a registered hauler empty the interceptor completely, and file the manifest | Houston requires full evacuation at least every 90 days unless the city approves a waiver |
| Yearly | Ask your water provider about backflow assembly testing, check hot water delivery, and schedule a camera inspection of kitchen and main lines | These checks catch cross-connection, heater, and pipe problems before they interrupt service |
| Before a remodel or reopening | Confirm plan review and the pre-opening inspection with your health authority, and confirm drain and hand sink placement | Harris County Public Health asks for a pre-opening inspection request after construction or remodeling |
What Restaurant Plumbing Covers and Why It Differs From a Home’s
A restaurant’s plumbing handles far more water, food solids, and grease than a home’s, and a health authority inspects it. The system includes kitchen drain lines, grease traps or interceptors, floor drains and floor sinks, hand sinks, prep and warewashing sinks, mop sinks, backflow assemblies, water heaters, and restrooms. A failure anywhere can interrupt service, because a backed-up drain or a hand sink with no hot water can stop a kitchen in the middle of a shift and draw a violation.
Our commercial plumbing services cover these systems for restaurants and other businesses across Northwest Houston.
What Causes Restaurant Plumbing Problems
- Fats, oils, and grease: FOG cools and congeals in drain lines and interceptors. Houston Public Works reports that fats, oils, and grease cause 70 percent of sewer overflows in Houston.
- Food solids: Scraps, rice, pasta, and coffee grounds reach the drain when strainers go missing or break.
- Late pump-outs: A full interceptor passes grease downstream and can push wastewater back into the kitchen.
- Dry traps: Floor drain traps that sit unused can lose their water seal and let sewer odors into the kitchen.
- Hot water shortfalls: Hand sinks that run cold often trace to the water heater, the distance from the heater, or a failed mixing valve.
- Older or damaged lines: Sagging, cracked, or root-invaded pipes hold water and debris and clog again and again. Our guide to why kitchen lines clog every quarter explains how grease caps form in horizontal runs.
- Cross-connections: Hoses and equipment without an air gap or backflow protection can pull dirty water into the supply.
Grease Traps and Interceptors: What to Check and How Often
What a Grease Trap or Interceptor Does
A grease trap or interceptor slows kitchen wastewater so fats, oils, and grease float to the top and solids settle to the bottom, and cleaner water continues to the sewer. Without that separation, grease cools inside the building drain and the public sewer and builds into blockages. The Food Code adds a practical rule for placement: if a kitchen uses a grease trap, the trap must sit where staff can reach it easily for cleaning.
Pump-Out Frequency and Paperwork
The City of Houston treats a restaurant or food dealer with a grease trap as a special waste generator. Under the City of Houston’s grease trap and FOG requirements, restaurants must fully evacuate interceptors at least every 90 days unless the Houston Health Department approves a waiver. Inspectors ask for waste manifests from the past five years, permits run for one year and renew annually, and inspections happen routinely or after a complaint, without advance notice.
Texas adds a hauler requirement. TCEQ’s guide for transporters of sludge wastes, publication RG-309, lists grease trap waste among the wastes that require a registered transporter, and it says trip tickets, also called waste manifests, record each collection and disposal. Other cities and utility districts may adopt their own grease interceptor rules, so confirm the schedule with your city or district before you set a pump-out routine.
Interceptor Checklist
- Access: Keep the lid reachable. Do not park a dumpster, a pallet, or a vehicle over it.
- Log: Record each pump-out date, the hauler, and the manifest number, and keep the paperwork in one place.
- Internal parts: Ask your plumber to inspect baffles, inlet and outlet tees, and the lid seal whenever the interceptor is open.
- Odors and slow drains: Treat either one as a sign that the interceptor needs service before the next scheduled date.
- Staff habits: Scrape, wipe, and strain before washing, and never pour fryer oil down any drain.
Our commercial plumbers install and service grease traps and interceptors, and we inspect the lines that feed them with a camera. A TCEQ-registered hauler handles pump-out and disposal.
Floor Drains: Keep Them Flowing and Trapped
Floor drains and floor sinks catch spills, mop water, and equipment discharge. Each one has a trap that holds a water seal against sewer gas, and each one needs a strainer or basket to catch solids. Most floor drain complaints trace to three causes: food and grease buildup, a trap that has dried out, or a line that has slowed downstream.
Food Code section 5-402.11 bars a direct connection between the sewage system and a drain that comes from equipment holding food, portable equipment, or utensils. Plumbers typically meet that rule by running equipment drains to a floor sink or a trapped floor drain through an air gap. The same section lets a warewashing machine connect directly to a trapped floor drain only when the machine sits within five feet of the drain, its outlet connects to the inlet side of a properly vented trap, and the law allows it.
- Strainers and baskets: Empty and rinse them every shift, and replace any that are missing or bent.
- Trap seals: Pour water into rarely used drains each week so the trap keeps its seal, or ask a plumber about a trap primer.
- Puddles: Watch for water that lingers around a drain after mopping, which can point to a slow line or a floor that no longer slopes to the drain.
- Odors: A sewer or rancid smell near a drain points to a dry trap or buildup.
- Repeat slowdowns: Call for jetting and a camera inspection when a drain slows again after cleaning. Our guide to common floor drain problems and fixes covers the causes.
- Equipment connections: Confirm that each equipment drain ends above the floor sink or drain with an air gap.
When a drain slows more than once, our hydro jetting and drain cleaning team clears the line and uses camera inspection to find the cause.
Hand Sinks: Hot Water, Access, and Placement
The Texas Food Establishment Rules adopt the FDA Food Code 2017 by reference, with listed exceptions, and the Food Code spells out what a hand sink needs. You can read the state rule on the Texas Food Establishment Rules of the Texas Department of State Health Services. The table below summarizes the plumbing items that matter most.
| Requirement | What to Check | Food Code Section |
|---|---|---|
| Water temperature | Run hot water at the faucet and confirm at least 100°F through a mixing valve or combination faucet | 5-202.12(A) |
| Faucet type | No steam mixing valve; a self-closing or metering faucet must run for at least 15 seconds without reactivation | 5-202.12(B) and (C) |
| Number of sinks | At least one, plus enough for convenient use | 5-203.11 |
| Location | Convenient to food preparation, food dispensing, and warewashing areas, and in or next to toilet rooms | 5-204.11 |
| Access and use | Clear access at all times, and handwashing only | 5-205.11 |
| Backflow protection | An air gap at least twice the supply inlet diameter and not less than 1 inch, or an approved backflow device | 5-202.13 and 5-203.14 |
| Condition | Plumbing kept in good repair, with leaks and slow drains fixed promptly | 5-205.15 |
Texas defines the plumbing code for food establishments as the more stringent of the International Plumbing Code as amended by the state, the Uniform Plumbing Code, or a local code, so your local authority may apply requirements beyond the Food Code. Stock each hand sink with soap and a way to dry hands, and keep carts, bins, and equipment away from it.
The usual hand sink failures are cold water, a faucet that runs for too short a time, a blocked sink, and a slow drain. Our plumbers correct hot water delivery, repair faucets and drains, and install or relocate hand sinks during remodels.
Other Restaurant Plumbing Systems to Include
Prep, Warewashing, and Mop Sinks
Prep and warewashing sinks usually drain through an air gap into a floor sink or trapped drain, so check those connections and the supply stops under each sink. Give staff a mop sink for mop water, and keep the hand sink for hands only.
Water Heaters
Hot water at hand sinks and warewashing sinks depends on heater capacity and the distance from the heater to the fixture. When hand sinks run cold during rush periods, a plumber can check the heater, the mixing valves, and the piping.
Backflow Assemblies
Backflow assemblies protect the public water supply from dirty water. The City of Houston’s cross-connection program requires an approved assembly where a potential risk exists, a licensed plumber installs it under the City’s plumbing code, and only a certified backflow prevention assembly tester completes the test report. Many Texas water providers require a yearly test, so ask yours for its schedule. Our guide to modern backflow systems for commercial plumbing explains how the assemblies work.
Restrooms
Include guest and staff restrooms in every walk-through. Look for leaking toilets, slow urinals, and hand sinks that run cold.
Warning Signs Your Restaurant Plumbing Needs Attention
- Slow drains: Kitchen sinks or floor drains empty slowly, especially after a busy shift.
- Gurgle noises: Drains make noise when another fixture runs.
- Odors: A sewer or rancid smell lingers near drains, the interceptor, or the dish area.
- Water that lingers: Water pools around a floor drain and takes a long time to clear.
- Visible grease: Grease shows in a floor drain, a sink, or the interceptor outlet.
- Cold hand sinks: Hot water arrives late or never reaches the faucet.
- Repeat clogs: A line clogs again within weeks of a cleaning.
- Leaks: Drips appear under sinks, around equipment, or at floor drains.
When a backup happens during service, stop using the affected fixtures, keep food away from standing water, and call us. Our 24/7 emergency plumbing team responds to commercial backups any time of day or night.
Staff or Licensed Plumber: Who Handles What
| Task | Who Handles It | Why |
|---|---|---|
| Strainers, scraping, and wiping | Staff | Daily habits keep solids and grease out of the lines |
| Hand sink supplies and temperature checks | Staff | A thermometer reading at the faucet shows a problem early |
| Cold or slow hand sink repairs | Licensed plumber | The cause often sits in the heater, valves, or piping |
| Interceptor access and log | Staff | Clear access and records keep pump-outs on schedule |
| Interceptor pump-out | Registered hauler | TCEQ requires registered transporters and manifests |
| Baffle, tee, or lid repairs | Licensed plumber | Internal parts decide whether the interceptor separates grease |
| Water in rarely used drains | Staff | A weekly refill keeps the trap seal in place |
| Repeat slowdowns, jetting, and camera work | Licensed plumber | Equipment and training find and clear the cause |
| Backflow testing | Certified tester | Only a certified backflow assembly tester completes the test report |
| Fixture installation and relocation | Licensed plumber | Permits, inspections, and code placement apply |
Restaurant Plumbing Services Compared
| Service | Best For | Pros | Cons |
|---|---|---|---|
| Scheduled interceptor service and logging | Meeting local pump-out rules and preventing backups | Keeps grease out of downstream lines and builds a paper trail | Needs a calendar and a reliable hauler |
| Hydro jetting | Lines that clog again soon after cabling | Scours grease and debris from the pipe wall | Does not repair broken or sagging pipe |
| Camera inspection | Repeat clogs and odors with no clear source | Shows breaks, sags, roots, and grease caps | Needs a clean line to see the pipe |
| Interceptor repair or upgrade | Damaged baffles, undersized units, or a failed lid seal | Restores separation and reduces backups | May need permits and planning around service hours |
| Hand sink and drain installation | New builds, remodels, and failed inspection items | Meets placement and temperature requirements | Needs plan review and an inspection |
| Backflow testing and repair | Annual test cycles and failed assemblies | Protects the public water supply and keeps records current | A failed assembly needs repair and a retest |
Restaurant Plumbing Rules in Tomball, Cypress, Conroe, and Northwest Houston
Your health authority depends on where the restaurant sits. Harris County Public Health inspects and permits retail food establishments in unincorporated Harris County and in the City of Tomball, among other cities. The Houston Health Department regulates restaurants inside Houston and inspects them at least annually, according to Houston Public Works. Conroe and the rest of Montgomery County follow their own local health authorities and utilities, so confirm the contact for your address.
Plan review and water approval carry local steps. For new fixed establishments, Harris County Public Health reviews the submitted equipment floor plan, and a request for a pre-opening inspection goes in at least ten days before the date you want after construction or remodeling. Water approval may require a form signed by your municipal utility district representative or approved well and septic information, so start the paperwork early.
Grease rules differ by jurisdiction. The 90-day interceptor cycle and the annual FOG permit apply inside Houston. Other cities and utility districts may set their own rules, and the Food Code and the plumbing code apply everywhere. Our Cypress commercial plumbing team and Conroe commercial plumbing team serve restaurants and other businesses with repairs, inspections, and routine plumbing service.
Frequently Asked Questions About Restaurant Plumbing
What should a restaurant plumbing checklist include?
It should cover grease traps and interceptors, floor drains, hand sinks, backflow assemblies, warewashing and mop sinks, the water heater, and restrooms. Give each item a frequency, an owner, and a log, so staff catch slow drains, odors, and cold hand sinks before a backup or an inspection.
How often should a restaurant clean its grease trap?
It depends on your jurisdiction and kitchen volume. The City of Houston requires full evacuation at least every 90 days unless the Houston Health Department approves a waiver. Other cities and utility districts set their own schedules, so confirm yours and clean sooner when drains slow or odors appear.
Who can pump out a grease trap in Texas?
TCEQ requires registration for those who transport grease trap waste, and trip tickets, also called waste manifests, record each collection and disposal. Hire a registered hauler and keep every manifest. Houston inspectors ask for those records, so file them where managers can find them.
What is the difference between a grease trap and a grease interceptor?
People use the terms interchangeably, and City of Houston guidance does too. Many plumbers use trap for a smaller unit near the kitchen fixtures and interceptor for a larger tank, often outside. Both separate fats, oils, and grease from wastewater before it reaches the sewer.
Does a restaurant kitchen need floor drains?
Many commercial kitchens use floor drains or floor sinks to handle spills, mop water, and equipment discharge, but the requirement depends on your plans, equipment, and local code. Your plan reviewer and plumber confirm the number and placement. The Food Code limits direct connections between equipment drains and the sewer.
Why does my restaurant floor drain smell?
A dry trap lets sewer odors rise, and food or grease buildup in the drain creates its own smell. Pour water into rarely used drains to refill the trap, clean the strainer and basket, and call us if the odor returns, because the line may need jetting or a camera inspection.
How hot must hand sink water be in a restaurant?
The FDA Food Code, which Texas adopts by reference with listed exceptions, calls for water of at least 100°F through a mixing valve or combination faucet at a handwashing sink. Test the temperature at the faucet during service, not at the heater, and call a plumber if the water runs cold.
How many hand sinks does a restaurant need?
The Food Code calls for at least one handwashing sink and enough for convenient use in food preparation, food dispensing, and warewashing areas, plus a sink in or next to toilet rooms. Your health authority sets the exact number during plan review, so confirm placement before you build or remodel.
Can staff use a hand sink to wash dishes or dump mop water?
No. The Food Code limits a handwashing sink to handwashing and requires access to it at all times. Use the prep sink, warewashing sink, or mop sink for other tasks, and keep carts and equipment away from the hand sink.
What are the signs that a grease trap needs service?
Slow kitchen drains, gurgling, rancid or sewer odors, grease in floor drains, and backups after busy shifts point to a full or failing trap. Do not wait for the next scheduled pump-out. Call your hauler and a plumber to check the baffles, the inlet, and the downstream lines.
Do restaurants need backflow preventers?
Many commercial properties do. The City of Houston’s cross-connection program requires an approved backflow assembly where a risk to the public water supply exists, and a licensed plumber installs it. A TCEQ-licensed tester performs the tests, and your water provider sets the schedule.
Can I pour fryer oil down the drain if I run hot water?
No. Hot water carries grease only part of the way before it cools and coats the pipe. Houston Public Works attributes 70 percent of the city’s sewer overflows to clogs from fats, oils, and grease. Collect used oil in a container and hand it to a recycler or your hauler.
Does a restaurant remodel need plumbing permits and inspections?
Many remodels do. Harris County Public Health asks for a pre-opening inspection request after construction or remodeling, and cities such as Houston require permits and inspections for building work. Your plumber and your health authority confirm the permits and the schedule for your address.
What should I do when a drain backs up during service?
Stop using the affected sinks and drains, keep food and people away from standing water, and call a plumber right away. Do not pour chemical cleaners into the drain. We respond to commercial backups 24/7, clear the line, and find the cause so the backup does not return.
Do you service restaurants in Tomball, Cypress, and Conroe?
Yes. Edmond’s Rooter-Man Plumbers serves restaurants and other commercial properties in Tomball, Cypress, Conroe, and across Northwest Houston, including grease trap and interceptor service, jetting, camera inspection, and backflow testing, with 24/7 emergency response. Call us or use our contact page to schedule.
When to Call Edmond’s Rooter-Man Plumbers
Call when a backup interrupts service, when drains clog again after a cleaning, when the interceptor shows odors or slow drains, when hand sinks run cold, when a remodel changes drains or fixtures, or when a failed inspection item points to plumbing. Our licensed plumbers diagnose the cause, clear and inspect the lines, service grease traps and interceptors, test backflow assemblies, and repair fixtures, and we explain each step in plain language.
We respond to commercial emergencies 24/7, any day of the week.
Why Choose Edmond’s Rooter-Man Plumbers
| What We Offer | What It Means for You |
|---|---|
| Texas-Licensed Plumbers (TSBPE Verified) | TSBPE-licensed plumbers handle commercial kitchen plumbing, from drain lines and fixtures to grease trap and interceptor work. |
| BBB Gold Star Recipient | A third-party record of how we serve business customers and resolve concerns, built on work in Northwest Houston since 1997. |
| Fully Insured: GL + Workers’ Comp (About Our Company) | Liability and workers’ compensation coverage protects your kitchen, your staff areas, and our crew during every commercial visit. |
| Grease Trap and Interceptor Service | We install and service grease traps and interceptors and trace the lines that feed them, so pump-outs and repairs fit together. |
| Jetting and Camera Inspection | We clear grease and debris with hydro jetting and use camera inspection to find the cause of repeat clogs. |
| Backflow Testing | We handle backflow testing and the plumbing around backflow assemblies, which keeps your water supply protected. |
| 24/7 Emergency Response | A backup during service gets a response any time of day or night, so you can get back to serving guests. |
| Clear Repair Advice | We explain what failed, what to fix now, and what can wait, so you can plan work around your service hours. |
Restaurant plumbing help in Tomball or Northwest Houston? Call 281.351.4422 for Edmond’s Rooter-Man Plumbers. TSBPE-licensed, BBB Gold Star accredited, insured, available 24/7.
Schedule Restaurant Plumbing Service in Tomball and Northwest Houston
A kitchen that stays open depends on clear drains, a serviced interceptor, and hand sinks that pass inspection. Edmond’s Rooter-Man Plumbers brings TSBPE-licensed diagnosis, full insurance, and 24/7 availability to restaurants in Tomball, Cypress, Conroe, Spring, Magnolia, and across Northwest Houston.
Call 281.351.4422 to schedule service, or contact us. Edmond’s Rooter-Man Plumbers, commercial plumbing for Northwest Houston since 1997.