Updated June 12, 2026 • ScrapMetalBuyers.com • All Guides
How to Scrap Aluminum Tanks and Brass Valves Safely and Legally
Aluminum tanks and cylinders with brass valves are a common scrapping find — but they require careful handling before any scrap yard will accept them. Here's the complete guide to doing it safely, legally, and profitably.
Why Scrap Yards Won't Accept Pressurized Tanks
Scrap yards refuse pressurized tanks because they can explode when processed through shredders or compactors. Before any tank is accepted, it must be completely depressurized, have the valve removed or punctured to prove it cannot hold pressure, and be free of hazardous contents.
Safe De-Valving Methods
For non-refillable aluminum canisters that are fully depressurized, use an adjustable wrench to unscrew the valve counterclockwise — most standard valves use a right-hand thread. Apply steady pressure and don't use impact tools. If the valve won't unscrew on a confirmed-empty canister, drill a small hole in the side of the canister (away from the valve) to confirm it's empty, then remove the valve. Never use a hammer or impact to break off a valve. Never heat a tank to remove a valve. Never drill into a tank without confirming it's depressurized.
Scrap Values: Aluminum Tanks vs. Brass Valves
Clean aluminum cylinders and tanks (de-valved) pay $0.50–$0.80/lb. Small aluminum canisters (de-valved) pay $0.40–$0.70/lb. Brass valves (clean, no iron) pay $1.80–$2.50/lb. Brass valves with iron components pay $1.20–$1.80/lb. The brass valve is typically worth more per pound than the aluminum tank — for a 1-liter canister, the valve may represent 30–40% of the total scrap value.
Legal Considerations
Refrigerant cylinders must have refrigerant professionally recovered before scrapping (EPA requirement). Propane tanks must be completely empty and de-valved, and many yards require a "purged" certification. Oxygen and acetylene cylinders are typically owned by gas companies — return them to the supplier rather than scrapping. Nitrous oxide canisters are legal to scrap when fully depressurized and de-valved.
💰 What ScrapMetalBuyers.com Pays for Tanks and Valves
As of June 12, 2026 — Call 954-488-0700 to confirm current rates before delivery.| Item | Market Range | SMB Drop-Off Rate |
|---|---|---|
| Aluminum Cylinders (de-valved, clean) | $0.50 – $0.80/lb | Up to $0.90/lb |
| Small Aluminum Canisters (de-valved) | $0.40 – $0.70/lb | Up to $0.80/lb |
| Yellow Brass Valves (clean) | $1.80 – $2.50/lb | Up to $2.60/lb |
| Brass Valves (with iron components) | $1.20 – $1.80/lb | Up to $1.90/lb |
| Steel Fire Extinguisher Cylinders | $0.05 – $0.10/lb | Up to $0.12/lb |
ⓘ Drop-off rates apply when you deliver to a confirmed ScrapMetalBuyers.com U.S. location. Call 954-488-0700 to find your nearest drop-off point and lock in your price before you haul.
📍 Drop Off & Get Paid More
Did you know that sellers who deliver directly to one of our U.S. drop-off locations receive a premium above our standard pickup rate? We pass the logistics savings straight to you.
Drop-off locations are available across the United States. Contact us first so we can confirm the nearest location, verify your material, and lock in your price before you make the trip.
📞 Call 954-488-0700 to Find Your Drop-Off Location Get a Drop-Off Quote OnlineFrequently Asked Questions
Do I need to remove the valve from every tank before scrapping?
Most yards require it for safety. Call ahead — some yards have their own de-valving process and will accept tanks with valves at a slight discount.
What if the valve is stuck and won't come off?
If the tank is confirmed empty, you can drill a small hole in the body to prove it's depressurized. Then the yard should accept it.
Are fire extinguisher cylinders worth scrapping?
Yes. Steel fire extinguishers are worth $0.05–$0.10/lb. Aluminum extinguishers are worth $0.40–$0.70/lb. The brass valve adds value. They must be completely empty and de-valved.
Where can I sell large quantities of aluminum tanks and brass valves?
ScrapMetalBuyers.com buys industrial quantities of aluminum cylinders and brass valves. Call 954-488-0700 for a quote and free pickup.
Can I scrap propane tanks?
Yes, but they must be completely purged and de-valved. Many yards require a signed statement or a "purged" certification. Never attempt to scrap a tank that may still contain propane.
What is the best way to store de-valved canisters before selling?
Keep them dry and store them with the valve opening facing down or sideways so any residual moisture drains out. Dry, clean aluminum commands the highest price.
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