Propane Filling Station
Fast, safe, and competitively priced propane refills for BBQs, RVs, forklifts, generators, and home heating tanks — right here in Lowell, MA.
Contact Us TodayFill Your Propane Tanks With Confidence
At Mark-One LLC, our certified propane filling station offers quick, safe refills for every type of tank — from a 20-lb grill cylinder to large commercial tanks. We don't just exchange tanks like the big-box stores; we fill them to the legal maximum so you get every gallon you pay for.
All of our technicians are trained and certified in propane handling, ensuring every refill, inspection, and repair meets the highest safety standards.
Our Propane Services
Whether you need a quick grill tank top-off or a full inspection of your residential system, we've got you covered.
- 20 lb / 30 lb BBQ & Patio Tanks
- 40 lb / 100 lb Portable Tanks
- RV & Camper Tanks
- Forklift & Industrial Cylinders
- Pay-by-the-gallon Pricing
- Quick In-and-Out Service
- Propane Tank Safety Inspections
- Valve & Regulator Replacement
- Leak Detection & Testing
- Tank Re-Certification (OPD)
- Hose & Connector Repairs
- Disposal of Expired Cylinders
How Our Refill Process Works
Drive up, fill up, and you're back on the road — usually in under 10 minutes.
Drive In
Bring your tank to our filling station in Lowell, MA — no appointment needed for standard refills.
Tank Inspection
Our certified technician quickly checks your tank for safety, valve condition, and certification date.
Precision Fill
We fill your tank by weight (or by gallon for larger tanks) so you get every drop you pay for.
Ready to Go
Pay at the counter and you're back on the road — fueled up and ready to grill, camp, or work.
Why Refill at Mark-One
Refilling beats exchanging — every time. Here's why our customers keep coming back.
Full Fills, Not Exchanges
Big-box swap programs only give you 15 lbs in a 20-lb tank. We fill to the legal maximum.
Pay Per Gallon
Only pay for what you actually receive — no flat-fee surprises.
Certified Technicians
All staff are fully trained in propane handling and safety protocols.
Quick Service
Most refills completed in under 10 minutes — no long lines, no hassle.
Frequently Asked Questions
Common questions about our services.
What tank sizes do you refill?
Is refilling cheaper than exchanging?
Do I need an appointment?
What if my tank is expired or out of certification?
Can you fill RV or camper tanks?
What forms of payment do you accept?
What Our Customers Say
"Best propane prices in the area. Fast service, friendly staff, and they actually fill the tank all the way up — unlike the exchange at the hardware store."
"I run a small landscaping company and Mark-One handles all of our forklift and equipment propane needs. Always quick, always professional. Highly recommend."
"Brought in an old expired tank thinking I'd have to scrap it. They re-certified it on the spot and filled it for less than the cost of a new one. Great service!"