Swap a standard 20-lb tank at any exchange cage — gas stations and hardware stores have them — and disposal is solved for the exchange price. County hazmat events take the rest, when one runs. Or book a pickup: a 15-lb tank is $79, a 120-gallon is $229, both fixed when you book. Tanks never go in trash or recycling bins.
| The tank in your garage | Where it actually goes | What it costs |
|---|---|---|
| Standard 20-lb grill tank, valve intact | Swap it at any exchange cage | The exchange price |
| Rusted, expired, or damaged valve | County hazmat event | Free, when one runs |
| 15-lb tank | Book a curbside pickup | $79, fixed at booking |
| 120-gallon tank | Your supplier if leased, a pickup if owned | $229 |
| Any tank, any size | Trash or recycling bin | Never |
Swap the standard tank where you'd buy a full one
The Blue Rhino and AmeriGas cages at gas stations and hardware stores are the propane industry's own take-back loop, and for the standard grill tank they genuinely work. You pay the exchange price, your old tank goes in the cage, and a full one comes home with you. Disposal is solved as a side effect of buying propane.
Notice what the trade assumes, though. It is an exchange, not a drop-off: the price buys a full tank, which makes sense if you still own a grill. And the system is built around exactly one product — the standard 20-lb cylinder, in the kind of condition a counter is willing to trust. If that is what you are holding, the swap beats anything on this page that costs money. Take it.
The tanks the cage was never built for
Walk the same garage with a stricter eye and the misfits show up. The tank with a rusted collar, or a date stamp from two owners ago. The one whose valve is seized, stripped, or missing. The 120-gallon cylinder from an old heating setup, which would not fit through the cage door even if a cage wanted it. None of these is a swap. Each one now depends on a person at a counter deciding to accept it, and counters mostly decide no.
The standing free answer for the misfits is a county hazmat event. Real, free, and they do take tanks. The catch is the calendar: events are infrequent, at a site the county picks, on a date the county picks, and you drive the tank there yourself. So the counter can refuse on sight, the next event is whenever the county says it is, and in the meantime the tank stays where it is.
A 15-lb propane tank is $79 picked up from the curb, and a second one on the same pickup is $19. The 120-gallon is $229. The price is fixed when you book — nobody comes out to look first, and nothing changes at the curb. 5.0 on Google, 150+ reviews · 4.9 on Trustpilot, 125+ reviews.
Propane tank, $79The 120-gallon tank behind the house
One question before anything else: whose tank is it? Big residential cylinders are often leased from the propane supplier, and a leased tank is their steel — you call them, they collect their property, and no disposal question exists. Check the paperwork before assuming it is yours to get rid of.
If you own it outright, it is a booking: $229, and the number is set the moment you book, not after someone looks at it. Put it where a hauler can reach it from outside — most of these already live outside — and it goes on the truck. It is the item on our cart that exists precisely because no cage, counter, or trunk was ever going to handle it.
When the hazmat event is the right answer
A county hazmat event costs nothing, and the people running it will take tanks the exchange counter would wave off. If your county has one coming up, the tank fits in a trunk you are willing to put it in, and the pile can wait until then, that is the free answer working as designed. Use it. The pickup exists for everyone who read that sentence and lost at one of its three conditions.
What happens after you book
Book first, then stage the tank. The price locks at booking, so it does not matter whether the tank is already out or still strapped in the shed when you pay. Haulers head out in the morning, and a text with the ETA lands before yours arrives; that tells you when the tank needs to be outside where a hauler can reach it. You do not need to be home. Photos come through when it is gone. Book by 2 PM and it goes today where same-day pickup is running, seven days a week.