A water jet pump uses an average 190 000 litres per year if used for 2-3 hours a day. An oil-free diaphragm vacuum pump performs the same function better and does not use a drop of water!
This alternative saves water, and does not pollute the environment with solvents. Labotec is offering 33% off on a NEW KNF Laboport Diaphragm Vacuum pump for your old water jet pump till end of July. Old for new, and an opportunity to save water plus free the environment from solvents.

The Common Water Aspirator
Water Aspirators are a common way of creating a low strength vacuum for many standard laboratory applications. Their simple design employs water running through a narrowing tube to create a reduced pressure.
The pump’s performance is dependent upon the temperature and pressure of the water, two variables that often change based on the number of users and the ambient temperature, resulting in an unreliable vacuum source.
In addition, in chemistry and biology labs, aspirators allow potentially hazardous solvents to mix into the water stream and flow down the drain. Since a stream of continuously running water is required to operate the pump, a significant amount of water is wasted.

The Vacuum Alternative
The cost of water coupled with the environmental impact of wasted water and solvent pollution need to be considered. Alternatives like oil-free diaphragm pumps offer deeper end vacuum capabilities and higher flowrates, minimal operating cost, and economical purchase price. In fact, operating cost savings realised by replacing a single water aspirator will quickly offset the up-front and pennies/month power costs of switching to an oil-free diaphragm filtration pump, leading to a quick payback period — often less than one year.
The KNF Laboport N 816.3 KT.18 Mini Diaphragm Vacuum Pump n Flow that Labotec is offering in their swop and save campaign giving you an opportunity to take advantage of using no water in future features a rate 0.96 m³/h / Ultimate vacuum 20 mbar abs. and PTFE-coated diaphragm is also ideal for aggressive/corrosive gases and vapours.