A restaurant kitchen fills with the smell of a sewer backup during the Friday dinner rush. A retail store loses water pressure across every restroom while customers wait. A warehouse discovers a slow leak behind a wall that has been quietly rotting the structure for months. These are the moments that separate a commercial property from a residential one—the stakes are higher, the systems are larger, and the cost of downtime grows by the hour. This is the work we do every day at Thompson Plumbing, Heating & A/C Inc..
The Scale and Complexity of Commercial Systems
Commercial plumbing is not simply residential plumbing done at a bigger size. The pipe diameters are larger, the water demand is higher, and the code requirements are stricter. A commercial building often serves dozens or hundreds of people at once, which means the drain and supply systems must move large volumes without hesitation. Backflow prevention, grease management, and water heater capacity all scale up to match that demand.
Our team understands how these systems tie together. A restaurant needs grease interceptors sized for its output. An office building needs restroom fixtures that resist heavy daily use. A medical facility needs plumbing that meets health department standards. We plan each project around the specific way a building is used, because a one-size-fits-all approach fails in the commercial world.
Common Commercial Plumbing Scenarios We Handle
Over the years serving Petersburg, Dundee, Ida, Britton, Ottawa Lake, Lambertville, Maybee, Milan, Temperance, Tecumseh, Monroe, and Erie, MI, we have worked on nearly every type of commercial plumbing challenge a business can face. The following list covers the situations we are called for most often, along with how we approach each one.
- Grease trap and interceptor service: Restaurants and food service kitchens depend on grease interceptors to keep fats, oils, and grease out of the municipal system. We install, clean, and repair these units to keep operations compliant and drains clear.
- Backflow prevention testing and repair: Many commercial properties are required to protect the public water supply with backflow prevention devices. We test, certify, and repair these assemblies so your building stays in line with local requirements.
- Commercial water heater systems: High-demand buildings often need large tank or tankless systems, sometimes multiple units working together. We size and install units that keep hot water flowing during peak use.
- Drain and sewer line cleaning: Larger drain lines carry more waste and clog in ways residential lines do not. We clear blockages and use camera inspection to find the true cause of recurring problems.
- Fixture installation and replacement: From touchless faucets to commercial-grade toilets and urinals, we install fixtures built to survive constant public use.
Each of these situations demands the right equipment and a plan that keeps your business running. We work to schedule the disruptive parts of a job during off hours whenever we can, so your customers and staff feel as little impact as possible.
Our Diagnostic and Repair Process
When we arrive at a commercial site, the first step is always understanding the full system before touching a single pipe. A quick fix that ignores the root cause tends to fail again, often at the worst possible time. We begin with a thorough assessment, using camera inspection for drain lines and pressure testing for supply issues. This lets us find hidden problems—corroded pipe, root intrusion, or failing joints—that a surface look would miss.
Once we identify the cause, we explain what we found in plain terms and lay out the options. Some repairs are straightforward. Others, especially in older Monroe County commercial buildings, involve aging materials that need to be replaced rather than patched. We give business owners a clear picture so they can make an informed decision. When the work is approved, our factory-trained technicians complete it with the correct parts and methods the first time.
Preventive Maintenance for Commercial Properties
The best commercial plumbing service is the one that stops a problem before it starts. A burst pipe or backed-up drain during business hours costs far more than the price of routine care. We build maintenance schedules around the needs of each property, checking the parts of the system most likely to cause trouble.
Regular maintenance includes inspecting water heaters for sediment buildup, testing backflow devices on schedule, cleaning grease interceptors before they overflow, and checking supply lines for early signs of corrosion or leaks. For businesses in Petersburg, Dundee, Ida, Britton, Ottawa Lake, Lambertville, Maybee, Milan, Temperance, Tecumseh, Monroe, and Erie, MI, this kind of planning turns unpredictable emergencies into scheduled, budgeted work. It also extends the life of expensive equipment, which protects your investment over time.
Technical Standards and Code Compliance
Commercial plumbing carries a heavier regulatory burden than residential work. Health codes, plumbing codes, and safety standards all apply, and inspectors expect strict compliance. Our team stays current on these requirements so your project passes inspection without delays. We handle proper venting, correct pipe sizing, appropriate fixture counts, and the documentation that goes with commercial permits.
Material selection matters too. In a commercial setting, we choose pipe, fittings, and fixtures rated for the demands of the application. That might mean cast iron for a busy drain line where sound and durability matter, or copper and PEX for supply runs where pressure and reliability are the priority. Every choice ties back to how long the system needs to last and how hard it will work.
A Family Business Serving Local Businesses
Thompson Plumbing, Heating & A/C Inc. is a family owned and operated business with deep roots in this community. Dale Thompson Sr. purchased the business in 1964 from Dave Roach. In those early years the company operated out of what is now My Papa’s Restaurant, before moving to its present location in the late 60’s. Today, three generations of the Thompson family are involved in the business.
All of our employees are factory trained and highly qualified. When you hire us for commercial plumbing work, you get a team that treats your business the way we treat our own. Reach out to Thompson Plumbing, Heating & A/C Inc. to discuss your commercial plumbing needs, and let us keep your property running smoothly year-round.