What causes slow suction on the vacuum prep station?

Cracked waste bottle cap, dirty or wet inline filter between the waste bottle and the vacuum pump, and more than 100-time usage of the vacuum prep probes are the most common causes of slow suction.

Check the integrity of the waste bottle cap. Replace the dirty or wet inline filter. Each system comes with two inline filters. You can order extra inline filters from Millipore with catalog number SLFG05010. Replace the probes after 100 times of usage.