Short answer
Commercial plumbing covers the same basics as residential work, but at a larger scale and with extra obligations: backflow prevention testing, grease interceptors for food service, commercial water heaters, and more involved permitting and inspections. The best results come from planned maintenance and a plumber who can schedule work around your opening hours. Availability for commercial work depends on the individual plumbing company.
How commercial plumbing differs from residential
A restaurant, office, shop, church, clinic or multi-unit property uses more water, through more fixtures, with more people depending on it. That changes the work in a few ways:
- Scale: larger pipe sizes, commercial-grade fixtures, bigger water heaters and more complex drain systems.
- Compliance: backflow prevention, grease management and accessibility requirements that most homes don't face.
- Downtime costs money: a closed restroom or a kitchen without hot water can shut a business down for the day.
- Access and scheduling: work often needs to happen before opening, after closing or in phases.
- Permits and inspections are usually more involved, especially for tenant finish-outs and remodels.
Common commercial plumbing needs
Backflow prevention and testing
Backflow preventers stop contaminated water from flowing back into the public water supply, for example from irrigation systems, fire sprinkler lines, boilers or kitchen equipment. Commercial properties commonly have backflow assemblies that must be tested periodically by a certified tester, with results reported to the water utility. If you have received a testing notice, it will explain what's required and by when.
Grease traps and interceptors
Restaurants, cafes and other food service businesses typically need a grease trap or interceptor to catch fats, oils and grease before they reach the sewer. These need regular pumping and cleaning. Neglected interceptors cause backups, odours and problems in the public sewer, and can lead to enforcement action.
Commercial water heaters
Commercial water heaters, boilers and tankless systems are sized for heavy, sustained demand. Food service needs hot water at specific temperatures for sanitation. Hard water accelerates scale buildup, so descaling and maintenance schedules matter.
Restrooms and fixtures
High-traffic restrooms wear out flush valves, sensor faucets and toilets faster. Accessibility requirements affect fixture heights and layouts in new or remodeled spaces.
Drains and sewer lines
Commercial kitchens, salons and laundries put heavy loads on drain lines. Periodic jetting and camera inspection can catch buildup before it causes a backup during business hours. See drain cleaning and sewer line repair.
Leaks and water use
A running urinal or a hidden leak across a large building can waste a lot of water. Irrigation on commercial landscaping is subject to the same city watering rules as homes, including the mandatory rain and freeze sensor. See leak detection.
Gas lines
Commercial kitchens and heating equipment often run on gas. Gas line work requires the right licensing and permitting.
Planning to limit downtime
- Schedule preventive maintenance during slow periods: water heater servicing, drain jetting, backflow testing, grease interceptor pumping.
- Know where your shutoffs are, including the main, each restroom and the kitchen, and label them. Staff should know too.
- Keep records of backflow tests, interceptor pumping and repairs in one place.
- Plan remodels in phases so part of the building can stay open.
- Ask about after-hours work in advance, and what it costs.
Choosing a commercial plumber
Not every plumbing company takes commercial work, and those that do vary in what they cover. When you speak to a plumber, it's reasonable to ask:
- Do you work on properties like mine (restaurant, medical, retail, multi-family)?
- Do you have certified backflow testers, or do you subcontract testing?
- Can you work outside our business hours, and what does that cost?
- Who handles permits and inspections?
- Can you set up a preventive maintenance schedule?
- Can you provide proof of insurance and license details for our records or landlord?
Plumbers in Texas are licensed by the Texas State Board of Plumbing Examiners. You can verify licenses on the TSBPE consumer page. Master plumber license numbers start with "M".
How a referral works for businesses
If you tell us about your property and the problem, we can connect you with an independent local plumbing professional. Whether they can take on a particular commercial job, and when, is up to the plumbing company. We don't do plumbing work ourselves. Read how it works for more detail.
Frequently asked questions
How often does a backflow preventer need testing?
Testing requirements are set by the water utility and the type of assembly. Commercial properties are commonly required to test periodically, often annually, using a certified tester. Your testing notice or the utility will confirm the schedule for your property.
How often should a restaurant grease trap be pumped?
It depends on the size of the trap or interceptor and how much grease the kitchen produces. Busy kitchens may need frequent service. A plumber or grease trap service can recommend a schedule based on how quickly yours fills.
Do commercial plumbing repairs need a permit in McKinney?
Many do, especially remodels, finish-outs, water heater replacements and new work. Minor repairs that do not remove, replace or relocate pipe generally do not. Confirm with the City of McKinney Building Inspections department or your plumber.
Can plumbing work be done outside business hours?
Many commercial plumbers offer early morning, evening or weekend scheduling, usually at a higher rate. Ask when you first contact them so the work can be planned around your business.
Who is responsible for plumbing in a leased commercial space?
It depends on your lease. Many commercial leases split responsibility between landlord and tenant for different systems. Check your lease before booking work, and involve the landlord or property manager early.