OPHIR 3L Air Tank Kit with Adapters Tube for DIY Airbrush Compressor, Black Air Tank Conversion Kit for Hobby Model Air Compressor Storage Tank

A week or so ago I picked up the better airbrush kit at Harbor Freight. While I eventually got it dialed in to a fairly steady pressure, I realized I needed a set up with a tank. Very seriously considered taking it back, paying the restock fee, and getting something else. Did a quick search and found this. It works a treat! I get consistent pressure at the brush even with long sprays. It's true, there are no instructions, but there is a video out there of someone assembling part of it. I'll give a few pointers here, but these will be specific to the Avanti compressor from Harbor Freight. 1.) Pick up some new O rings, 1/4 in ID 3/8 in OD. The rings that come with the kit aren't great and I over tightened the first time I tried and destroyed two of them. 2.) Pick up a 1/4in by 1.5 in Nipple, I'm adding a link here, but I got mine cheaper at the local hardware store. There are other options, but this is what they had and it works. https://www.amazon.com/EDGE-INDUSTRIAL-Brass-Nipple-Length/dp/B07DCF9J2J/ref=sr_1_4?crid=346J2P7P6OVIU&keywords=1%2F4%2Bby%2B1.5%2Bnipple&qid=1652562653&sprefix=1%2F4%2Bby%2B1.5%2Bnipple%2Caps%2C93&sr=8-4&th=1 3.) The cutoff sensor on the Avanti is the same as the one that comes in the kit (3kg on, 4kg off), so no need to mess with it. 4.) You'll need either thin open end wrenches of appropriate sizes (12 mm and 14 mm) and an adjustable (crescent) wrench, or you can get away with the crescent by itself. To assemble, 0.) Attach the feet to the tank. 1.) Unscrew the regulator from the compressor. This can be tricky, but I found that using an adjustable wrench if I went lefty loosey on the bolt where the airbrush hose connects, the regulator unscrewed from the compressor. OR use a THIN* 14MM open end wrench and unscrew the connector between the compressor and the regulator directly. (THIN means 5MM or less) 2.) Remove the feet from the compressor 3.) Attach one end of the pipe to the square 90 by fitting it inside the opening and pushing two o-rings to the fitting. Loosely screw the connector on. Do not tighten as you'll need to adjust it later. 4.) Attach the other side of the square 90 to the opening where the regulator came out. Snug it down but don't tighten yet, you will need to ensure the flat side of the pipe attachment is on the front and back. The pipe will need to be vertical 5.) On the tank there is a smaller opening and a larger (1/4 in) opening, put the appropriate fitting into the smaller opening where the larger part is facing out 6.) Set the compressor on the tank fitting the pipe into the opening of the fitting you just placed, you may need to adjust the positioning of the pipe vertically to ensure it seats in both the upper and lower openings. Once that is done, pull the compressor off the top of the tank 7.) With the compressor off the tank, loosen the square 90 to a position where it is possible to tighten the compression fitting on the pipe, and ensure it is snug. Make sure the font and back have flat sides on the bolt. Tighten the Square 90 into the compressor completely ensuring the pipe is vertical. You'll see the compression fitting is nearly flush with the compressor, thus the need to have a flat side there and not a corner. Set compressor aside 8.) put the nipple into the other opening on the top of the tank, and put the rounded 90 on the other end of the nipple 9.) If you have not already done so, remove the connector from the regulator that was used to connect to the compressor, and screw the regulator in to the rounded 90 and tighten ensuring the moisture trap is down. 10.) Add the Red fitting to the of centered hole toward the top 11.) Add the drain fitting in the bottom 12.) Set the compressor back on the tank 13.) Use the included screws and nuts to attach the feet of the compressor to the tank (it will be a tight fit due to the nipple being vertical. It is possible to change this arrangement, but I didn't want my regulator sticking out from the compressor and tank.) 14.) Snug the bottom of the pipe to the fitting 15.) Plug the compressor in and fire it up. If you got really lucky you'll have no air leaks. I didn't get lucky and had to do a little rework on a couple places, but it was pretty painless. Soapy water makes it easy to see where the leak is. Note: it's going to take a some time for the compressor to kick off. Just about the time you think you messed up is when it will shut off.

All in all it's a good air tank for the cost. Mine did arrive with rust in the threads, and missing hardware. However it mounted my badger TC909 like it was made for it. As others have said no instructions are provided but realistically its soo simple to assemble they are not needed. I had to assemble and then disassemble a few times for correct assembly order. I used the kit supplied tube and fittings to connect the compressor to the tank, although the o-rings seem cheap it sealed first try. Overall it's a great addition to an airbrush compressor if you want to hear the compressor kick on less frequently.

Excellent product recommended 100%

This kit is VERY do it yourself...as in go out and try to collect parts and pieces you will need to complete it. There is a whole bag full of parts and fittings, with about half of what will be useful. Expect that your compressor will not line up with the ports and mounting locations on the tank. You will need to bend the hard supply line from the compressor head to the tank (and it doesn't bend easily). I have no idea what the flexible braided line is for because there are no fittings or clamps that would make it useful. The threads in the tank will be rusty and/or painted and need to be cleaned out or you may just end up stripping the few fittings that are useful. The big secret to all these kits (or trying to hook up your airbrush compressor to any tank) is, the fitting you need to hook up your water trap/regulator is pretty much nonexistent. It's certainly not provided in this kit. Good luck finding what you need. Chances are VERY slim it will be at any hardware stores and will be near impossible to locate online. Good luck and enjoy the extra cost! By the time you round up and pay for extra fittings you will need, you would be better off spending $80-$90 for a Timbertech compressor with tank already installed. I may look at returning this pile of steaming garbage and doing just that.

I assembled this to fit my Avanti Harbor Freight compressor based on another review here with instructions. The first time I put it together, I had leaks everywhere. I ended up having to pull the compressor apart about 3 times chasing leaks, and probably spent about 3 hours doing so. Had to go to the store and get some liquid thread sealant, in addition to o-rings and a fitting that was needed. Even with the thread sealant, still had leaks… eventually the only thing that worked was a combination of plumbers tape AND the sealant. The first time I pulled it apart, one of the cheap o-rings was split, like a lot of reviews say. I’ve finally got all the leaks fixed, but honestly had I known how much of a pain it would be, and the extra $ spent to get this thing going, I definitely would’ve been better off just buying a brand new compressor!

This tank appears to just about only choice for one wanting to add a small tank to their airbrush compressor. As noted by others, no instructions provided, nor any parts identification list. Had to purchase better hardware early into assembly with my Paasche compressor. After initial assembly, "everything" leaked, had to disassemble reseal and reassemble - FOUR TIMES! Fittings did not fit the ports correctly and leaked with teflon tape, them pipe sealant, then BOTH! Finally, disassembled again (fifth time) and replaced virtually all the Ophir-provided fittings, chased all the threads with a tap, cleaned and taped all fittings and reassembled carefully. It still required some tweaking, but now holds pressure and is what I needed to compliment my airbrush. For an item costing this much, it should be easier to get to a useable state! This item seems unsuitable for the average hobbyist who lacks experience in mechanical assembly and pneumatic systems and fittings, not to mention the variety of tools and required additional fittings required to complete the project (including the thin wrench required to properly tighten the pressure relief valve, taps to clean up threaded fittings, brass elbows and nipples). I consider myself a reasonably experienced DIY'er but this took three afternoons in addition to trips to Home Depot, Lowes, Ace and ordering components from Amazon to be able to put this tank into service with my airbrush setup. This was way too much additional work for a simple tank to put together with a small compressor.

This kit makes my small airbrush compressor perform so much better. There are no install instructions but it’s pretty much common sense so if you don’t have common sense stop reading right now. Everything will to be secured with need the Teflon tape to prevent air leaks, and trust me it’s not worth the time it takes to skip this step just to have to go back and re do all connections. I skipped and ended up hating my life while I went back to do things correct. All in all this unit is great and now my compressor doesn’t have to run non stop while I airbrush which is going to allow it to last so much longer and not have to strain when I work on larger projects while also allowing my airflow to be consistent and constant. This is a absolute must have if you have a small airbrush compressor without a tank!

I was hoping that my newly purchased Master Airbrush TC-320 compressor would fit this particular tank but unfortunately it did not. However, with some simple modifications I made it work just fine. I'm posting a few picks to help show what I did to make it work which should help you. The feet of the compressor do line up with the tabs welded onto the tank but the compressor itself is too long to fit between the two bung fittings (welded pipe into the tank) on each end of the tank with their associated pipe fittings attached. The easiest fix is to raise the compressor high enough to clear these fittings. I used 1" square aluminum tubing each cut 1-1/4" long then placed each on top of the tank with the compressor on top to align and mark its eventual position. This left the pipe between the tank and compressor head too short so I ordered 8mm OD aluminum tubing and cut to fit. The bung on the tank was welded crooked so using a piece of wood with a 21/64" hole through it I was able to bend the middle of the tubing to line each end up with the fittings. I did use 1 aftermarket black o-ring at each end of the new tubing which worked fine. I also used both teflon tape and pipe dope on all other fittings. Once completed everything works as expected with no leaks.