There are fewer hazards in handling metal vacuum systems due to the very unlikely risk of implosion. House Vacuum Water, solvents or corrosive gases must never be allowed to be drawn into the building vacuum system. When a potential for such a problem exists, a trap must be inserted between apparatus and the vacuum inlet. Pumps Hazards Vacuum pumps are of various kinds. Turbomolecular pumps are also used but apart from being electrical equipment, these present little danger being totally enclosed.
Vacuum pumps are electrically powered apparatus.
Belt driven rotary pumps present danger of entrapment in the moving belt and pulley wheels. The exhaust of rotary pumps may be contaminated chemically but will also contain an oil mist from the pump itself. There is a danger of explosion if the exhausts of rotary pumps that are pumping large volumes of air or other gas are blocked or obstructed. Diffusion pumps are heated to boil the pumping liquid and so present a risk of burns. Glass diffusion pumps are vulnerable to breakage and if these contain mercury the danger of mercury contamination is great.