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Air Tank for cheepskates

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Forum topic by poopiekat posted 108 days ago 132 views 0 times favorited 8 replies Add to Favorites
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poopiekat

56 posts in 123 days


108 days ago

http://i280.photobucket.com/albums/kk161/poopiekat/018.jpg

Have you ever brought your BBQ tanks in for a fill-up, only to be told they are expired/obsolete?

I needed an air tank to retrieve a car with flat tires…So I took an empty propane tank, purged out all the fumes and put on a hose from an old BBQ I wasn’t using. With a hose barb, (everything 1/4” NPT) I put on two brass Tee’s with a short nipple between them. I bought a brass valve stem, looks just like one on a bike, only with NPT, an old pressure gauge, and a Milton quick disconnect (not shown in photo).
Now I can not only inflate tires, I can operate my air nail guns, spray guns and airbrushes, and nozzles. They’ll run for a surprisingly long time on one fill. It will even run an impact wrench, but rotary type tools require a little more volume. You can refill from your own compressor, or if you’re away from power, you can re-fill at a gas station tire pump. It’ll hold 125 psi. The shutoff valve maintains pressure even during long storage and will indicate tire pressure at the gauge if it’s closed. Use Teflon thread tape on all threaded connections.

So don’t run 100 feet of hose to that outdoor repair project, make yourself a tank like this.

ps, thanks to ‘Lew” who mentioned his scuba tank idea. Great minds think alike.

-- If stradivarius was alive today, he'd be using Gorilla Glue.

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GaryK

8182 posts in 377 days


108 days ago

I remember buying a small tank for about $20 a long time ago for the exactly what you describe. I had to go and let someone borrow it. I haven’t seen it since.

-- Gary, East TX -- The longest journey begins with a single step.

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poopiekat

56 posts in 123 days


108 days ago

Yes, a handy tool like that is bound to grow legs. Nowadays, they’re $60 or better in my neck of the woods.
Gary, did the pic link work for you?

-- If stradivarius was alive today, he'd be using Gorilla Glue.

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DannyBoy

200 posts in 254 days


108 days ago

Wow. That is awesome. I’m sure there is some hazmat rule against this, but who cares?

My luck, I mix up the bottle with one I have for the grill and my tires would explode halfway to work one day.

-- Happy Ripping!!!

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rikkor

6465 posts in 263 days


108 days ago

I don’t have a gas grill. How hard are the expired tanks to acquire?

-- Maplewood, MN

View Scott Bryan's profile

Scott Bryan

7762 posts in 210 days


108 days ago

rikkor,

They are not hard to get at all. If you go to a propane supplier they will probably give you one since they have to charge a disposal fee for accepting them. What people generally do is wait until after hours and simply drop them off unannounced.

Poopiekat,

This is an interesting idea. It saves paying a disposal fee on one of these and it gets a second life as a useful tool. Nice post.

-- With God's help all things are possible- even woodworking. Woodworking is not just a hobby, it is an (expletive deleted) expensive hobby.

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rikkor

6465 posts in 263 days


108 days ago

Thanks Scott.

-- Maplewood, MN

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poopiekat

56 posts in 123 days


107 days ago

Oh, one more thing…the orifice at the valve is quite a bit smaller than the diameter of your hose, which is probably designed to not discharge propane too rapidly in case of a hose rupture. So filling the tank with air from your compressor takes a bit of time, maybe 5-10 minutes. This is probably why it won’t run high-consumption rotary air tools. You can tell at a glance how much pressure is in the tank simply by opening the valve and observing the gauge. Close the valve, and you have a handy tire-pressure gauge, (if your tire chuck is attached.)

Thanks, everyone for your positive reactions! I got more things I built for my shop from salvaged junque, will post some more things later.

-- If stradivarius was alive today, he'd be using Gorilla Glue.

View Dadoo's profile

Dadoo

1398 posts in 379 days


107 days ago

Why not? Guys used to use old Freon tanks for the same thing. The thing about propane tanks is that they are thicker and might hold more PSI…I’m not gonna volunteer to find out how much! I do know from refilling Fire Dept. SCBA tanks (2200 psi) that when they do explode, people die. Home compressors usually don’t go beyond 125psi so you should be quite safe with that. Well, safer than using one of those cheap Walmart tanks anyhow! A suggestion would be to relabel the tank too. People wouldn’t freak out seeing you inflating your tires, or powering an air tool. And you wouldn’t see Homeland Security comin down on you with the beliefs that you’ve created some new kind of suicide vehicle.

I would question using the POL Valve as well. They are designed not to allow free flow…keeps the pyros from blowing up houses. So they gotta come out.

What does your local gas company say about doing this? You don’t see these things routinely so I would imagine theres some kind of law stating that you can’t. Be a good idea to check first.

Anybody know?

-- Bob Vila would be so proud of you!

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