Intro: In Line/ Portable Air Tank Out of a Propane Tank
This is a old air tank that I use for starting fires and for filling my air cannon.
This tank was made with parts that where on hand a many many years ago. I had to take it apart because of a small leak and wanted to show how it was made.
Use an EMPTY propane tank. You don't want gas leaking out and causing an explosion. Also compressed air can be dangerous. I'm not sure what a propane tank is rated for but keeping the PSI at a reasonable amount should be OK.
Step 1: Whats Needed
- standard EMPTY BBQ propane tank with vale removed. Preferably newer then the one I used
- Air gauge 0-100 PSI (could go higher then 100)
- 1/4 female T
- 1/4 T male/female though female take off
- 1/4 male nipple
- 3/4 to 1/2 reducer
- 1/2 to 1/4 reducer
- 2 female air couplings
- pipe joint compound
- 5/8 wrench
- 11/16 wrecnh
- 3/4 wrench
- 3/8 to 1-1/4 adjustable wrench (1" wrench)
Step 2: Removing the Propane Tank Valve.
I am not so sure on this part. Find a wrench that fits and apply some torque.
Step 3: 3/4 to 1/2 Reducer
Apply joint compound around threads and screw it in. The reducer needs to be very tight so it does not come lose.
Step 4: 1/2 to 1/4 Reducer
Apply joint compound around threads and screw it in. A 3/4 wrench should tighten it.
Step 5: 1/4 Male/femal Through Female Take Off
Apply joint compound around bottom thread and screw it in. Tighten the T with a 3/4 wrench to where it points at where the gap is in the rim/handle on the tank.
Step 6: Gauge
Apply joint compound around threads and screw in the air gauge. Tighten with wrench to where the the text is readable and not lopsided. I used a 0-100 PSI but higher is OK. The compressor I use only puts out 115 PSI.
Step 7: 1/4 Male Nipple
Apply joint compound around one of the threads and screw it in. Tighten with wrench.
Step 8: 1/4 Female T
Apply joint compound around threads of the nipple and tighten the with a wrench to the T is in line with the other T.
Step 9: Air Couplings
This can be done 2 ways I prefer using one coupling.
Apply joint compound around threads of each one and screw and tighten them into both sides of the T
Use step 10 to fill the tank.
or just one on the side by the gauge and use step 11 to fill the tank.
Step 10: How to Fill It OP.1
- 2 1/4 male couplings
- 1/4 male ball valve.
Step 11: How to Fill It OP.2
- 1/4 male coupling
- 1/4 male ball valve
Step 12: Test for Leaks and Fill Up.
Test for leaks by connecting the male coupling to the air line and turn the ball valve to open.
Look for any bubbling of the joint compound at the connections.
If there are not leaks then it is good to use.
Keeping the tank inline should help keep the pressure longer before the compressor cycles. Close the valve and release the coupling and you have a portable tank for airing tires, starting fires, and filling air cannons.