Do BBQ propane tanks actually expire?
Sort of. The tank doesn't go bad on a set day, but it does run out of legal refills. The City of Toronto's barbecue safety page puts it plainly: in Canada propane cylinders must be inspected and requalified, or replaced every 10 years. For a tank that's never been requalified, the 10 years count from the date it was made.
That matters the next time you go for a refill. The City of Toronto notes that an attendant is not permitted to fill an outdated cylinder, and the Canadian Propane Association says it's against the law for an expired or damaged cylinder to be filled. So if your tank is past its date, expect to be turned away at the counter, which is a tough way to find out on a long weekend with a cooler full of burgers.
The rule applies across Canada, so it's the same in Ontario as anywhere else. Ontario's fuel safety regulator, the TSSA, is the place to go with questions about propane rules in this province.
Where to find the date on your propane tank
Look at the collar: the metal ring around the valve at the top of the tank, the part you grab to carry it. The Canadian Propane Association says propane cylinders have a range of identifying marks on the cylinder collar, and the City of Toronto notes you can see the date your cylinder was last qualified there too.
Don't panic when you see a jumble of letters and numbers. Most of the stamps are manufacturing and specification details. You only need to find two things: the date the tank was made, and any requalification stamps added since.
How to read the date stamp
Here's how the Canadian Propane Association's guide to cylinder markings breaks it down:
- Manufacture date: a month and a year, sometimes with a small inspector's symbol between them. 04 10 or 04Δ10 means April 2010.
- Requalification stamp: a group of numbers and letters that ends in E. In 05 PD3 13 E, 05 is the month (May), PD3 is the requalifier's registered mark, 13 is the year (2013), and E stands for External Visual Inspection.
- More than one stamp: the CPA notes that requalification may happen several times over a cylinder's life, so an older tank can carry more than one.
A quick example: if the collar says 06 16 and there's no stamp ending in E, the tank was made in June 2016 and reached its 10-year mark in June 2026. It needs requalifying or replacing before it can be filled again.
If you can't find or read the date, the CPA suggests contacting your retailer, exchange company, or Transport Canada. If there's a requalification stamp and you're not sure how long it's good for, ask them that too rather than guessing.
A tank can be finished before it turns 10
The date isn't the only test. The City of Toronto points out that a cylinder less than 10 years old may need replacing, and that a rusty, damaged tank could mean you're ready for a new one. And as the CPA notes, the law covers damaged cylinders as well as expired ones: neither can legally be filled.
Every time you swap or refill, give the tank a quick look for rust or damage. If something looks off, let the person filling it make the call. They see a lot more tanks than the rest of us.
What to do with an expired propane tank
You've got a few options. The Canadian Propane Association says requalification must be done by an organization that is registered by Transport Canada, and Transport Canada keeps a searchable list of registered facilities. Plenty of people simply replace the tank instead, and the CPA notes that some retailers and refill outlets will take back expired cylinders, especially if you buy a new one, though that's at the retailer's discretion and not required.
What you can't do is put it out with the trash. The CPA is clear that propane cylinders should never be thrown in household garbage or recycling containers for curbside pickup. If you live in Vaughan or elsewhere in York Region, the Region lists propane cylinders as an accepted item at its household hazardous waste drop-off depots. Check the Region's page for the nearest depot and its hours before you go.
Getting the tank there safely matters too. The TSSA says you can carry up to five 20-pound cylinders in a vehicle as long as each one is secured upright in the passenger compartment with the windows open, in a trunk with the lid propped open, or in a ventilated box. The City of Toronto adds that you should never leave a propane cylinder inside a parked vehicle with the windows sealed. We'd go straight there and straight home.
Hooking up the new tank (and storing the spare)
Once your new or requalified tank is home, connect it and check for leaks before you light anything. Barrie Fire and Emergency Service's barbecue safety advice is to mix equal parts soap and water, brush it over all the connections with the appliance turned off, then open the cylinder valve. Bubbles mean a leak. If you find one, close the cylinder valve and contact a certified gasfitter, and repeat the test after the repair until there are no bubbles.
If your BBQ's connection has an O-ring, Barrie Fire also suggests checking it every time you connect a tank. And keep the spare outside: the TSSA says to never store propane cylinders indoors or in a garage, and to store them upright. The City of Toronto also says not to store extra cylinders beneath your barbecue. Heading into the cold months? Our BBQ winterizing checklist covers what to do with the tank over winter.
While the tank is off, take a look at the hose and regulator as well. We replace hoses, regulators and valves when they're worn or leaking, and after a repair we run safety checks, including a leak test. If you ever smell gas, turn off the gas at the tank or supply valve, don't use the grill, and call us. For anything else, text us a photo of the problem, plus the brand and model if you have it, and we'll get back to you with a quote. We come to you across Vaughan, York Region and the GTA.