General information only, last reviewed October 25, 2026. Full notice at the end of the page. A date on this page has passed. Check the current rule at the source before you rely on it. Dates to watch
For a lot of fuel distributors, propane is the natural second act. It uses the same core strengths: delivering fuel, running routes, and billing per gallon. It also opens a recurring residential and commercial customer base. The product and equipment are different, but the business shape is familiar.
What it is
Propane distribution is delivering propane (LP-gas) to homes, farms, and businesses that use it for heating, cooking, crop drying, forklifts, and more. A distributor fills customer tanks, usually with a bobtail truck, and bills for the gallons delivered, the same deliver-and-bill model as other fuel lines.
How it differs from liquid fuel
Propane is stored and moved as a pressurized liquefied gas, which means dedicated tanks, equipment, and safety handling. Gasoline and diesel use unpressurized tanks and racks. The customer relationship works the same way, but the physical product is distinct, so the equipment and training are a separate investment.
Why distributors add it
Because it builds on what they already do. Propane brings a steady residential and commercial base, often complementary to other lines, and leans on existing route and billing muscle. It is a natural way to grow without leaving the distribution business you know.
Keep-full, will-call, and the K-factor
Propane accounts split into two camps. Will-call customers watch their own gauge and phone in orders. Keep-full (auto-fill) customers expect the truck to arrive before the tank runs low, and that forecast runs on heating degree-days and K-factors. A K-factor is the number of degree-days an account takes to burn one gallon. Worked example: a home with a K-factor of 8 that takes 100-gallon drops needs its next delivery about 800 degree-days after the last one, timed so the gauge never falls below the reserve floor, which many operators set near 10 percent.
Cellular tank-percent monitors are replacing that math on hard-to-predict accounts, but most keep-full books still run on the degree-day clock. Either way the dispatch discipline matches liquid fuel, and run-out risk peaks exactly when the forecast data goes stale. That is why operators keep the tanks, gallons, and per-gallon billing behind those forecasts in one system, and why FastDragon carries propane as another tracked product line.
Quick answers
Who owns the propane tank at a customer’s home?
Often the distributor does. Company-owned tanks are leased to the customer, and the lease normally lets only the tank’s owner fill it. Some states also make it illegal to fill a tank without its owner’s consent; West Virginia is one (W. Va. Code 15A-10-15). So the lease effectively locks in the account. Customer-owned tanks can be filled by any supplier, which is why some homeowners buy their tank outright to shop on price.
Why are propane tanks only filled to 80 percent?
Safety codes such as NFPA 58, the Liquefied Petroleum Gas Code, cap how full a propane container may be filled. Under OSHA’s version of the limit (29 CFR 1910.110), a home-size aboveground tank may take propane weighing up to 42 percent of the water it would hold, roughly 80 to 85 percent of its volume. Propane expands as it warms, and the vapor space above the liquid absorbs that expansion so pressure stays within safe limits. A “full” 500-gallon tank therefore holds about 400 gallons of product.
What licenses and training do propane bobtail drivers need?
A CDL with both hazmat and tanker endorsements, often earned together as the combined X endorsement, which adds a TSA security threat assessment and fingerprinting on top of the written tests. A first-time hazmat applicant must also finish entry-level training from a provider on the FMCSA Training Provider Registry (49 CFR 380.609). Some states license the drivers too: Texas requires a Railroad Commission certificate for anyone whose job involves contact with LP-gas, apart from supervised trainees (16 TAC 9.8). For industry training, the Propane Education and Research Council replaced its Certified Employee Training Program (CETP), bobtail course included, with the PERC Education Program (PEP) during 2025.
Why does a customer’s K-factor change over time?
Anything that changes how fast the home burns gas moves it: new insulation or windows, a swapped appliance, a pool heater, more or fewer people in the house. Good operations recalculate after every drop and flag accounts whose number shifts sharply, because a stale K-factor is how run-outs happen.
Sources, read October 25, 2026: West Virginia Code 15A-10-15 (filling a tank without the owner's consent); 29 CFR 1910.110 (LP-gas filling densities); 49 CFR 383.93 and 383.153 (CDL endorsements) and 380.609 (entry-level training); TSA, hazmat endorsement threat assessment; Texas Railroad Commission LP-gas rules, 16 TAC chapter 9 (9.8); Propane Education and Research Council, PERC Education Program; U.S. Energy Information Administration, Degree days.