It can be defined as a preventative, complementary or corrective intervention in order to ensure the continuity of the whole process. This can include any substance or part in the process in addition to equipment used. The issue of maintenance has a great importance for Wastewater Treatment Plants where continuity is essential. As continuity is important, preventive maintenance plays a great part of the service offered. In addition, the reaction time of the maintenance service is essential in cases of accidents or other unwanted situations. Our company fills in an important gap in Preventive Maintenance and Service with its expert, experienced and varied staff.