Why does the dust caps don't keep on the bleeder valves?

When the caps are placed, the enclosed air is pressed into the upper part of the valve. If liquid is still present, an overpressure develops and the caps fall off. If you have our small bleeding deivce, you can simply suck the liquid out or vacuum it with a paper towel. Then keep the dust caps safe.

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.