Review on 🧹 Powerbuilt 648744 Vacuum Pump Set: Efficient Hoses, Plastic Reservoir & Adaptors by Marc Gallner

It's a tough choice. On the one hand, the Powerbuilt 648744 vacuum pump looks good. On the other hand, it's really not very practical or efficient. Its cylinder volume (the amount of air moved in one stroke) is just too small to be of much use. Powerbuilt's volume is sufficient to bleed car brakes, but there is another issue related to bleeding. The vacuum bleed causes air to flow through the bleed screw in the line to the powerbuilt. This creates an endless stream of bubbles when the pump is running. It is impossible to determine when there is no air in the brake system. The Powerbuilt 648744 is an efficient vacuum pump, but its small volume limits its application. Be disappointed with this limitation. I also do not recommend this product for bleeding car brakes.