FOUR UNCLES 3L Vacuum Brake Bleeder - Pneumatic Brake Bleeder Kit with 3L Brake Fluid Extractor and 1L Refilling Bottle

Great tool to save time and effort. Works without a helper pushing the pedal.It did a perfect job on clutch and brake system.had an issue with a fitting, and their support team sent me a new fitting! Great service/supportThanks!

FONCTIONNE TRÈS BIEN !!!

Quality product and a good price. Comes with everything needed to get the job done along with extra adapters. The adapters for the bleeders fit snug and do not have any leaks like other cheap pumps that won’t create a vacuum. This is a must buy tool for removing air out of your brake system without having an additional person.

Tried using to bleed my brakes after replacing a line. Worked ok but uses a lot of air volume. Would work better for just flushing the system rather than bleeding the lines. Hard to tell if all the air is out because it sucks air from around the bleeder screw.

I work in a shop and this the best vacuum bleeder I've used so far. Use it at twice a week if not more. I like that it holds large capacity can do a complete vehicle without dumping. Quieter then some I've used. Does the job.

I tried it and it worked well once. The quick connect for the suction hose locked right in, the air hose as well. Suction is not super powerful but works and does the job. The silicon hoses are excellent, the fitting that attaches to the bleed valve is great. The lock on the air valve works well and easy. Pulled out 32 ounces in about 10 minutes from the main reservoir and the four brake cylinders. Air never quit flowing through the hose but there is no air in the brake lines, perhaps it is coming from the threads on the bleed valve. I went to use it a second time and neither suction line would lock into the brass quick connect. The line inserts but the collar simply refuses to snap back up regardless of how hard I pushed. They simply will not attach. Everything else is excellent. It's a shame the quick connect has a flaw. This is going back and will look elsewhere.

Everything working good thank you

I guess the first thing I will review is the brake fluid bottle, this is a terrible design and does not work well to attach to a master cylinder, the manufacturing left large plastic lips from where the mold faces met each other on the thread surface and these needed to be removed in order to stop the leaks at the. cap. The clamp that is attached to the tube grips the master cylinder in the wrong spot which causes the entire bottle to shift to the side. This idea would have been much better implemented had they just given a plate that screwed onto the actual brake fluid bottle which you could then turn upside down and rest on the master cylinder. Now onto the actual brake bleeder. When this thing arrived I was unable to open it. I had to insert the handle in a bench vise and use a strap wrench to turn the base. Once I was able to separate the top from the base I discovered that sloppy manufacturing was the cause again. The threads on the actual container had thin plastic lips hanging from them all over the place, there was a nasty looking gnarled edge at the top of the container which was preventing it from contacting the O-ring. The threads on the top portion of the bleeder were also terribly formed, I had to use sandpaper and a file to clean them up. once I corrected all of the manufacturing defects it was time to connect it to shop air and test the vacuum performance. This was another place where I was disappointed in my purchase. This tool will pull a vacuum as long as you hold the trigger, as soon as you let go of the trigger all of the vacuum is lost. This could very easily have been prevented by installing a check valve in the underside of the trigger assembly. I ended up doing so for an additional cost of course. There are no extra hoses, brake bleeder adapters or anything else included with this item. For all of the work I had to invest making this tool usable I could have either designed my own or spent more money with another manufacturer. Unfortunately after all of that being said I do not recommend this tool. There is no guarantee that you will be able to correct the manufacturing defects and I would not waste my time trying.

First off, the product seems well made. The plastic bits are thick and reinforced with gussets...it looks like you could drop it around the shop and it won't fracture. There is an aluminum plug with double rubber seals to hold pressure. The valve hardware is okay...brass or aluminum, so it won't rust. The hoses are like a surgical rubber, clear-ish so you can see the fluid in the line. It even comes with extra line and a smaller step-down tube. The fill bottle also is made of thick plastic and a brass valve.. This is a well made kit.In my case, the fill bottle didn't securely stand on my Master Cylinder, even with the clamp. The metal fill spout was very tall, so pretty much bottomed out on my reservoir. The clamp would pinch the threaded mouth of the reservoir, but it wasn't a great fit. The weight of the full bottle easily threatened to roll over and spill. I had to use some tape to hold it upright against my hood. After that, it worked perfect. I could have tightened the metal clamp more, but was worried it would crack the plastic reservoir mouth. The piece tightening onto the mouth of the reservoir just doesn't present a good surface against the threads...so it's just a wobbly fit, unless you crank the screw so tight you risk cracking. If you have a deep reservoir, maybe it sits on top of the mouth, square, and takes up most of the weight...but for me, with the depth of my reservoir and my hood in the way...it was a wobbly fit. I had to tape it in place. Again, not ideal. But the bottle was so nice with a great shut off tap. I think this is the best part of the kit, even if my car made the fit wobbly.The next dissapointing part is the vacuum draw. I have a pancake porter-cable air compressor from Home Depot. It says it gets 120psi at the valve, but this thing is wide open when you pull the trigger. The pressure drops fast. I hear the compressor fire up again in 30 seconds and it stays running. So, it requires alot of volume...probably more than my pancake compressor can do. I didn't get any fuild from a new(empty) line. I checked the tip by putting my finger over it...and it was barely sucking. I think this has more to do with my compressor than the product...but there are so many opportunities for air leaks: 1) at the bleeder screw threads, 2) at the air hose connections, 3) elsewhere in you lines. This just doesn't pull enough to overcome the air loss. I had to do the "2-man" bleeding method anyway, to force fluid into a new line, and find leaks elsewhere in the system. For my application, I also had a Shuttle valve to contend with, so it was partially blocked off. I think this kit would work better for maintenance and brake jobs in existing systems already full of fluid. It was hard to use for a dry system.The last complaint is a minor one. The tube comes with a rubber attachment that fits over the bleeder screw nipple. This is more like a hands-free attachment, because it feels designed to keep the hose attached if tugged. But it's ill fitting...hard to get over the nipple, but loose once past the opening. So, it stays on, but kind of air leaks. It's also large, so for my front bleeder screws which are in a tight spot...didn't fit. A piece of stretchable vacuum hose works better. But they give you plenty of extra hose, so you can use that.Overall, good build quality. But other factors like you car's actual spaces and your compressor type can make this hard to use. Can't fault the makers. But I would try one of these out before you buy it(if possible). I think they make one of the better ones out there...just personally not sold on the concept.Edit: Four Uncles customer service has reached out to me to offer help. They have offered to send me another kit. They even offered me a partial refund. I think their customer service is probably good. So, as a business, they are good to deal with. I raised 1 star for that.