That provided them ample protection during use and meant that we were unlikely to accidentally damage them on the job.Īt the very bottom of the regulator assembly, you’ll find the tank drain valve. We were also pleased to find these sensitive controls and couplers partially recessed within the tanks. Having two outlet fittings means you can connect and use two pneumatic tools at once. The pressure regulator was tough to turn at first, but once we broke it free, it worked as expected. The pressure regulator control is between and below this assembly are the twin outlet fittings. Once we bottomed it out, the pin inserted fully into the hole.īetween the tanks lie the twin pressure gauges, one for the tank PSI and the other for the outlet PSI. After inquiring with Bosch, we found that the locking mechanism hadn’t been fully threaded into the steel plate. You don’t want that in a tool that is otherwise very ruggedly built. This made the handle a bit unsteady in its upright position. In addition, there was only one, whereas we would expect there to be one on each side of the handle. What we noticed, however, was that the locking pin was very shallow. The integrated handle swings up and locks in place to allow you to easily cart the compressor around the jobsite. Other than inserting the oil dipstick/cap there is no further assembly required to get the CET4-20W up and running. One of the wheels lost its seal and we had to re-inflate it. We found this out the hard way when a friend rolled all 85 pounds off the side of an 8″ tall deck. They should be located on the outside of the wheels. You can (barely) reach them using the backside of a standard tire inflation adapter. The wheels go on such that the inflation stems are located on the inside. They all but eliminate the need to pick it up, save unloading it from your truck or work van. The wheels, however, make it easy to port this tool around. The entire compressor weighs nearly 85 pounds, making it quite heavy to lift. The first thing we did was attach them using the included bolt washers and nuts. The system comes with the wheels detached.
![compressor 4 gallon compressor 4 gallon](https://www.dbmimports.com/assets/images/4gallonaircompressor2.jpg)
It ships filled with oil and the cap includes an integrated dipstick for checking levels every 200 hours of use. You literally have tubular steel surrounding all of the sensitive parts. The air compressor is oil-lubricated to keep the parts from premature wear. The electric 2 horsepower engine sits within a steel roll cage which protects it from the hazards of jobsite use. The tanks are welded steel and are oriented vertically, which makes draining easy. The Bosch CET4-20W 4-gallon compressor comes in the expected Bosch Blue. This is no simple trim compressor! Bosch CET4-20W Build Quality That makes it one of the heavier units (by roughly ten pounds) we’ve tested. Because this is a heavier-duty model, be aware that it weighs in at around 85 pounds.
![compressor 4 gallon compressor 4 gallon](http://dndtool.vn/datafiles/setone/thumb_800x800_1553135240_825a.jpg)
They also mount the tanks vertically, something unique that allows both tanks to drain simultaneously.