UView 550000 Airlift Cooling System Leak Checker & Airlock Purge Tool Kit - Professional Automotive Cooling System Diagnostic & Maintenance Tool for Mechanics & DIY Enthusiasts - Perfect for Flushing, Bleeding & Pressure Testing Radiators

A must-have tool for refilling coolant into present day vehicles! Very pleased with the quality and usefulness of this tool. Shop air (an air compressor) is required for this tool to operate.Shipping was very prompt!This is a really nice, high-quality vacuum coolant filler. Not cheap, but you pay for quality of which I have no doubt this will last for many years. Its construction is all heavy-duty metal, brass I believe, and all the valves are solid, high-quality pieces as well. I've seen some made of plastic or cheap metal which would probably be fine for occasional home DIY use but not for repeated, professional use.There are a few rubber adapters included but I've found the cone adapter is all you really need. I have used some of the other adapters but that usually requires pinching off the overflow tube which isn't a big deal but it is an additional step.Filling is a very satisfying process! The radiator hoses get vacuumed flat and the coolant just flies into the cooling system. Very cool. Once the needle reaches zero, you're done. Quick and easy. You may have to top up the coolant a bit. Also, if the vacuum gauge moves (before filling with coolant), then you have a possible leak somewhere. It's an excellent system and product.Really made the coolant change in my goldwing super easy. Great tool to have in the box.After reading the reviews on various tools of this sort and an immediate need for a this kind of tool I settled on this brand. I decided to go mid range on the price and this tool had high ratings. Not using a tool like this before to add coolant to a cooling system I was a bit apprehensive as to how it would work.The application I needed it for was on a class A motor home that would not accept the fluids by gravity flow. I knew how much fluid I had drained from the system but could not inject the same amount by filling the recovery bottle, as this was the only means to get fluid into the system. The heater core being the highest component in the system seemed to create the problem. Upon a "How to" search I learned about the process of using the vacuum method to charge the system.How did it work? --- The tool is well built and the adaptors that came with the tool served me well. I had to mount the tool on the recovery bottle and since I was changing all the hoses I put a vacuum test on the system to see how the tool worked. It pulled a heavy vacuum and held it for hours before I changed hoses. I did a radiator flush and had to add water to the system and all went as expected. After changing all the hoses I put a vacuum on the system to see if all the fittings were tight and it held a vacuum for over 24 hours. This was an indicator the tool sealed well to the recovery bottle and that there would not be any leaks in the new hose joints. The screen on the charging hose was not an issue for me as the fluids were sucked into the system in short order. This was about 4 1/2 gallons in a 5 gal. bucket. There was still a vacuum in the system when the system was full. Because the gauge is on top of the unit and my recovery bottle is elevated I had to use a mirror to read the dial which was not a problem.i have a 5 horse compressor in my shop and air pressure set at 125 psi. Using 100 ft of air hose to the RV it pulled the vacuum down in about 2 min. This tool uses two hoses. One for the vacuum and one for the fluid transfer. I found no problem with the interchange of the hoses and the ball valves worked well. I did elevate the 5 gal bucket with the antifreeze to the proximity of the recovery bottle to help the transfer.The directions were plain enough to get the job done and after playing with the tool a bit it all fell into place. Mission accomplished!I would recommend this tool for the quality and ease of use. Unless you break this unit it should last a long time. I am glad I bought this one.This product worked perfectly. I had no difficulty creating a seal and allowed the vacuum to be maintained to ensure that there were no leaks in the system. Once the valve was opened the coolant filled the entire system in a matter of minutes to the perfect level. There were no air pockets in the coolant system. I could not be more satisfied with this product it is well constructed and should last a lifetime.For some reason I could not find a mechanic shop to do a proper vacuum fill. My vehicle is notorious for being difficult to properly bleed. This resolved months of headaches in a few short minutes. I went with this version because I did not want any plastic crap breaking on me or becoming brittle over time. This thing is heavy duty and have already used it a lot more than anticipated. Easily paying for itself many times over.Works perfectI'm a dealership technician and I have been borrowing my coworkers coolant bleeder for years he has this same one and it works great for Toyota/Lexus cars! He's had his for so long all his hoses are super yellow and rock hard and this thing still works wonders. Finally bought one for myself it works perfectly!Caring the case and the plastic handle came off and it doesn't fit back on the box so the case is no good