How to Tell If Your Propane Tank Is Empty

Knowing how much propane you have on hand is an important part of keeping your home and equipment running smoothly. While propane systems are designed to operate reliably, running out of fuel can interrupt heating, hot water, and other essential functions.

Here are a few simple ways to check your tank level, whether you’re using a portable cylinder or a larger residential tank.

Checking a Portable Propane Cylinder (20 lb, 30 lb, 40 lb)

Portable propane cylinders offer a convenient, transportable fuel source and are commonly used for grills, patio heaters, and other small appliances. Because they don’t always include built-in gauges, checking the level may require a hands-on approach.

Method 1: Weigh the Tank

Most propane cylinders have their “tare weight” or empty weight listed on them. By weighing the tank and subtracting the tare weight, you can estimate how much propane remains by weight. Because propane is measured in pounds for these cylinders, this method offers a more accurate reading than visual checks.

Method 2: The Warm Water Test

Pour a small amount of warm water down the side of the tank, then run your hand along the surface. The area that feels cool to the touch typically indicates the level of propane left inside the tank. Though this method gives a general estimate, keep in mind that it may not be entirely precise.

Signs a Portable Cylinder Is Running Low

In addition to checking smaller tanks manually, you may notice a few common signs your tank is nearing empty, including:

• A weak or uneven flame
• Reduced heat output
• Noticeably lighter tank
• Appliances are working less efficiently than usual

These signs can vary depending on the appliance and conditions, but they can generally indicate that it’s time for a refill.

Checking Your Home & Business Propane Tank

Unlike portable cylinders, permanently installed propane tanks commonly used in residential and commercial applications typically include built-in gauges and can be monitored more easily than portable cylinders. Regularly checking your tank level can help prevent unexpected interruptions.

Method 1: Read the Tank Gauge

Most residential and commercial propane tanks have a percentage gauge, usually located under the tank lid. This gauge shows how full the tank is by percentage, rather than the exact number of gallons remaining.

For example, 80% is considered a full tank (since tanks are not filled to 100% to allow for expansion), while 50% is half full. If your gauge says 30% or lower, contact your nearest Suburban Propane location to schedule a refill.

Because the gauge provides an estimate, it’s good to check it periodically, especially during colder months when usage may increase.

Method 2: Remote Tank Monitoring

Propane tanks may be equipped with digital tank monitoring technology that provides fuel level visibility and usage insights to your local Suburban Propane service center. This helps reduce the need for manual checks and streamlines refills when paired with automatic delivery.

Signs Your Home or Business Propane Tank Is Running Low

Beyond checking the gauge, you may notice changes in performance as your home’s fuel levels decrease, including:

• Reduced heating performance or output
• Hot water takes longer than normal to heat
• Gas appliances operating less consistently

These signs can vary depending on usage and operating conditions, but may indicate that your fuel is running low and it’s time to schedule a delivery.

Suburban Propane’s Delivery Options

Keeping your tank filled doesn’t have to be a manual process. Suburban Propane offers delivery options designed to help ensure a consistent fuel supply, based on your needs.

1. Automatic Delivery

Automatic delivery uses historical usage and seasonal trends to estimate when your tank needs refilling. This delivery method reduces the need for frequent manual checks and lowers your risk of running out of fuel.

2. Will-Call Delivery

With will-call delivery, you monitor your own tank level and request a refill when needed. This option offers you more control but requires careful attention to your fuel level.

3. Tank Monitoring

Tank monitoring systems can offer additional visibility into your propane usage. These systems may track levels more accurately and support timely deliveries when paired with automatic service plans.

FAQs 

At what percentage should I order a propane refill?

Most homeowners schedule a refill when their tank is 30% or lower. This can help provide a buffer during periods of higher usage. 

Can I run my propane appliances if my tank is almost empty?

While you can still run propane appliances when your tank is almost empty, they may not perform as efficiently as usual. We recommend scheduling a refill before your tank runs out completely to maintain standard performance.

Why does my propane gauge read full, but my appliances aren’t working?

There can be many reasons why your appliances aren’t working, even if your propane gauge reads full. Some potential causes include regulator issues, system interruptions, and appliance-specific problems. Contact a qualified professional to diagnose the issue safely.

What happens if my pilot light goes out because my tank is close to empty?

If your tank is close to empty, your pilot light will go out, and your system may need to be inspected before being restarted. Having an inspection ensures safe operation and proper gas flow for your system.

Does Suburban Propane send alerts when my tank is running low?

Yes, Suburban Propane offers digital tank monitoring and delivery services that provide visibility into tank levels and timely refills. Contact us to learn more about available options for your system.