Why Isn’t My Propane Tank 100% Full After Delivery?

Written on: February 12, 2024

Get to Know the 80/20 Rule

Have you ever noticed that your propane tank is never 100% full after a delivery? That’s by design. Why don’t we completely fill your propane tank? Physics. Propane is a liquid inside your tank. When any liquid warms up, it expands and takes up more space. Propane expands a lot and quickly. In fact, it expands about 17 times the volume that water does, given a set temperature increase.

For this reason, our technicians leave extra space so the propane can safely expand in your tank. For aboveground tanks, that means filling the tank to about 80% capacity. In the industry, that’s known as the 80/20 rule.

Underground tanks can be filled slightly more because these are insulated against big temperature swings. So now you know why your propane tank isn’t 100% full after delivery. Now, let’s take a closer look at what these percentages mean.

Reading Your Propane Gauge

Do you know how to tell how much propane you have in your tank? That’s where the propane tank gauge comes in. When you check the gauge, you’ll see a number that represents a percentage. For example, if the dial reads 30, you have approximately 30% of a tank left of propane.

If you know your tank’s capacity, you can calculate the number of gallons that percentage represents. If you’re really on top of things, you know your weekly propane usage and can calculate how long your current supply will last. Just remember, you never want your tank level to get seriously low. We always advise customers to call and order more propane when they see that their tank gauge has reached the 20% level. This will give us plenty of time to schedule a delivery for your home.

Just keep in mind that your gauge isn’t fool-proof or perfectly accurate, so it’s best not to push your luck delaying a propane delivery.

About Your Propane Tank

If you’re not sure your propane tank size is right for your household’s needs, Briles Oil & Gas can help with that. Simply talk with one of our propane professionals. They can help you upgrade to the best size propane tank for your home’s needs based on your current or future planned usage.

Here are the propane tank sizes we offer at Briles Oil & Gas:

In addition, we can also supply you with portable propane cylinders for your grill and other outdoor propane appliances. Briles Oil & Gas has cylinder refill stations at all locations.

Propane Delivery in Denton NC and Beyond

Briles Oil & Gas is the region’s gold standard for dependable propane delivery. Instead of always checking your tank gauge, you can make life easier by requesting our Keep Full automatic delivery plan. It will make getting your propane effortless and worry-free. We will track your propane usage and the current weather. That information allows us to predict when you will need a propane delivery, and we’ll schedule it before your fuel runs low.

Briles Oil & Gas has decades of experience providing safe and courteous service in North Carolina’s Alamance, Chatham, Davidson and Randolph counties.

Contact Briles Oil & Gas today to learn more or to start getting reliable propane delivery for your NC home.