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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Garage - Tools> how can i make a water heater into a a.c. tank?
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Topic Review (Newest First)
05-09-2003 08:13 PM
kiaserknife the farther away from the air source you put your filter the better.
05-09-2003 07:16 PM
Bartman39 I had a friend that was a painter and he had problems with water and trying to paint... So I came up with an idea to use a condensor from an older Chevy truck (78-79 or so...?) I used compression fittings to pipe in the air from the compressor which was an uprigt 80 gal w/6-hp 2 stage (175psi)... I mounted it to the wall of the garage on a shelf but behind it I placed a simple 20" box fan ($20 from Wal-Mart) and piped it down to a good water seperator which held about 1 pint of water when full... The thing worked so good it would fill the seperator in just a days use... We tested it with an air nozzle at full blast and never got any moisture ever... For some reason his paint work got alot better too...

A note about upping the capacity of your compressor... If you over do the tank size you`ll work the pump to the point of overheating and failing... Pumps are designed for a certain amount of storage in cubic ft... The are also designed around a certain amount of run time at a given speed... So if you need more volume either get a bigger compressor w/tank or dont go over double your presant volume...
05-07-2003 10:57 AM
dinger I've seen a gas water heater used once for a compressor tank, it ran off a a.c. compressor on a work truck in a wrecking yard I worked at as a kid. A smaller tank, it couldn't have held much pressure, it worked well for the wrecking yard duty. As Willys and the rest stated, using for high pressure applications sounds like an accident waiting for a place to happen. I eliminated a lot of water collection by running my air lines from the comppressor to overhead in the rafters, they came down to a water trap, across to another trap, then out for usage. Never had problems with water in paint. Dan P.S. When you use a compressor that can't keep up with your tools, is continually running, heat from the compressor constantly running is going to build condensation. Cool air into a hot compressor equals water.

[ May 07, 2003: Message edited by: dinger ]</p>
05-07-2003 10:03 AM
farna Now here's an idea: go to the local welding supply and see if you can buy a couple older tanks, ones that have passed their renewal date. Compressed oxygen tanks are rated to hold a couple THOUSAND psi. They are tested regularly, but after a certain date expire and can't be used. You could plumb a couple of those together to use as air reservoirs. Even if they have a diminished capacity, they should still be good for a couple hundred PSI easily.

You need to drain your air tanks on a regular basis. If you do, you won't get water in your tools. The water filter helps, but they still need to be drained at least 2-3 times a year (depending on your climate -- here in Mississippi on the Gulf Coast I have to drain monthly).
05-06-2003 08:19 AM
Jag Daddy Water Heater for a air storage? Aren't some of those things glass lined? Talk about a bunker buster. Man I wouldn't want to be pickin glass fragments outa my behind (and what ever else it hit) for the rest of my life, if you even had one after that.

Regards
Mark
05-06-2003 05:12 AM
Dragon J Please be safe 68MUSTANG- I just went to Harbor Frieght and got a BIG water trap to wall mount and it seems to be taking a LOT of moisture out of my system and it was on sale for about $25!!! They also include a schematic for setting up your shop compressor- if you still get moisture get a bigger compressor- it's easier to pay for than doctor bills!
05-03-2003 04:11 PM
adtkart Usually a water heater goes bad because of corrosion/leaking. Why would anyone even consider using that for an air tank? I, like most of us, look for ways to save money. Never at the cost of safety!
05-03-2003 09:19 AM
willys36@aol.com Oh no, you mean I got suckered by a troll?!?!?!? !!!!!!!GAG, PUKE, WRENCH!!!!!!!
05-02-2003 03:41 AM
woodz428 Sounds like an accident waiting to happen. After looking at the profiles (the avatar made me curious), I think this is the same high school kid that claims to own an original Shelby (of course they were called Cobras) and just sold a non-existant '69 Shelby Hertz GT350. Better do your homework junior and save the fantasies for elsewhere.
05-01-2003 09:44 PM
willys36@aol.com Air gauge just tells you why it blew, doesn't protect against it. Can you guarantee that the walls of the pressure vessle have absolutly no internal corrosion? A few corrosion pits will derate the vessle by half or more. Vessles in industrial service must be checked regularly and certified for service. I'm not concerned about the pop off valve - on the proper type vessle, it is an appropriate protection. However, the energy stored in pressurized gas is MANY times that stored in pressurized water. If a 120psig water heater bursts, a seam splits and the water runs out. If the same vessle bursts from gas pressure, it will take out the whole building, maybe the next building over and the vessle will be found half a mile away if it is found at all. I have seen the result of an air reciever vessle bursting and it is very sobering. Air tanks cost a lot more than water tanks of the same pressure rating for a reason. Don't want to rain on your parade but that isn't a good place to economize.

Check with welding supply store, maybe Lowe's can get you one, or Harbor Freight probably can supply you one at a discount price.

[ May 01, 2003: Message edited by: willys36@aol.com ]</p>
05-01-2003 09:06 PM
68MUSTANGhardtop hows it going to blow with a pop off valve and an air gauge? but thanks for your reply ,prolly wont try it but not sure what else to use.

oh and if anyone has any suggestions i would appreciate them.

[ May 01, 2003: Message edited by: 68MUSTANGhardtop ]</p>
05-01-2003 08:43 PM
willys36@aol.com Don't even think of it. A tank that big blowing up is not something you even want to think about. In fact, if it did blow and even if no one got hurt, you may be liable for criminal charges 'cause the laws covering pressure vessles is rigorously enforced.
05-01-2003 08:21 PM
68MUSTANGhardtop
how can i make a water heater into a a.c. tank?

have 2 small air compressors in my shop. tanks are 10 gallon i think ( the kind with a horizontal tank on wheels with a handle)anyway i have 2 filters wall mounted and i still get alot of water to my tools when i use a tool with high rpms and the compressor has too run constantly to keep up the demand.
ok my question is can i pipe both into an old hot water heater to act as a 50 gallon tank?
the one i looked at is rated at 150 PSI and both compressors are regulated at 120 PSI.
any suggestions on how this can be done or some other cheap(note cheap)alternative ?

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