Expert Generator Maintenance in McKinney, TX
A generator is like a car engine; it requires regular care to run when you need it most. Top Flow Plumbing Co. offers comprehensive generator-maintenance plans to ensure your backup power system starts instantly during the next storm.

Why Generators Fail When Needed
Dead Batteries
The #1 reason generators fail to start is a dead battery. Without regular testing and trickle-charging, your unit won't even crank.
Dirty Oil
After 24-48 hours of continuous running, your generator needs an oil change. Old sludge can seize the engine permanently.
Stale Fuel
For portable units, gas left in the tank for months can clog the carburetor. Professional generator-maintenance prevents this corrosion.
Protect Your Investment & Warranty
Most manufacturer warranties require proof of annual service to remain valid. Our certified technicians perform a 20-point inspection that covers everything from valve adjustments to firmware updates. We catch small issues—like cracked hoses or loose wires—before they turn into expensive repairs. If it has been more than a year since your last service, get started with a maintenance visit to lock in your reliability.
Fluid Analysis
We change oil, coolant, and filters.
Load Banking
We stress-test the engine to ensure it handles full power.

The Top Flow Tune-Up
Visual Inspection
We check for oil leaks, debris inside the enclosure, and signs of rodent nesting that could damage wiring.
Consumables Swap
We replace the spark plugs, air filter, and oil filter with high-quality OEM parts to keep the engine breathing freely.
Electrical Test
We test the battery voltage and verify the output frequency (Hertz) to ensure clean power for your electronics.
Simulated Outage
We flip the transfer switch to force a live run, verifying the generator-maintenance was successful and the system is combat-ready.
Benefits of Annual Service
Extended Lifespan
Well-maintained generators can last 20+ years. Neglected units often fail within 5-7 years due to internal corrosion.
Warranty Compliance
Don't let a voided warranty cost you thousands. We provide the documentation you need to keep your coverage active.
Total Peace of Mind
Sleep soundly during a thunderstorm knowing a professional has personally verified your backup power system.
Don't Find Out It's Broken When The Lights Go Out
There is nothing worse than hearing your generator try to start during a blackout, sputter, and die. By then, it’s too late to call for help. Emergency repairs during a storm are expensive and often impossible due to part shortages. Routine generator-maintenance is the only way to avoid this nightmare scenario. If you want to ensure your family isn't left in the cold, visit our contact page to book your annual checkup today.

Trusted by Homeowners Across North Texas
At Top Flow Plumbing, our commitment to excellence is reflected in the positive experiences of our customers. Here's what some of them have to say about our plumbing services:
"Aaron was fantastic. We had a leak and he showed up in a timely matter, fixed the issue and gave us great knowledge as new home owner. Would definitely recommend!"
"Aaron has always been amazing he has done a lot of work for me and is always helpful and quick to fix any issues. I very much appreciate all the work and help I have received"
"Their team was professional, knowledgeable, and efficient. Highly recommend if you need a plumber who truly knows what they’re doing and cares about doing it right!"
" I wouldn't hesitate to call Top Flow again for any plumbing issue. They were fast, took my 'emergency' seriously and they were ready to help me get it fixed. These guys are amazing, call them."
"They were responsive when I needed assistance! They were available to come within that week and not only assess the issue but install a new kitchen sink for me... I highly recommend this company. They do great work!"
"We have a commercial building that was having issues. Two other plumbers along with city inspectors were lost. Top Flow came in, got to work and found the issue within a day. Thank you for your quick work. Highly recommend"
"The team was able to come out and fix my septic pipe in just a few days. It was a relief to know that old pipe was replaced. I was also able to have them take pictures of the pipe fix for my records."
"Aaron and his team were great. We had two minor plumbing issues and a pipe under our slab leaking. Timely service and reasonable prices AND they got the problems resolved fast. Will use them again"
"Damium and his team were great. We had to change our toilet urgently and they showed up right on time and replaced it pretty quick and they got the problems resolved fast. Will be using them again."
Professional Service vs. DIY
Why your generator needs more than just an oil change.
FAQ About Generator Maintenance
Got questions? We’ve answered the most common ones below to help you stay informed and confident in your next repair or installation.
Manufacturers recommend a full generator-maintenance service once a year, or after every 100 hours of run time (whichever comes first).
Yes! We can perform tune-ups on portable units, including carburetor cleaning and oil changes, to ensure they start easily.
Generator engines run hotter and harder than car engines. Old oil breaks down quickly, leading to piston wear and catastrophic engine seizure.
Yes. We offer annual service agreements that include priority scheduling and discounts on parts. You can contact us to sign up for a plan that fits your budget.
Still have questions?
Get in touch with our team—we’re happy to help.
Ready For The Next Storm?
Don't leave your comfort to chance. Schedule your professional generator-maintenance with Top Flow today.

