Before you use vacuum, make sure you have a vacuum trap to collect
waste. Waste or liquid should never be allowed to enter the
central vacuum system or the vacuum pump. It is advised to use a secondary
trap connected to the waste collecting trap.
For drying gels, cooling the trap with ice or dry ice shortens
the time it takes for drying a gel.
For most lab applications, a low vacuum (5-10 mm Hg, 50-100 Pascal) is sufficient for
applications such as gel drying or de-gassing.
Water aspirator vacuum pump generates vacuum by water flow. The simplest
unit attaches to tap water. Enclosed units circulates water. Make sure
water is at the desired level and change water periodically to minimize
Oil needs to be changed regularly for oil-vacuum pumps.