# 2001 Munich
Due to an increased environmental awareness, also in the field of sewerage, the problems with leaking drains have been given special emphasis. As sewage systems and treatment plants are often converted from mixed wastewater to concentrated, highly polluted water, leakproof pipelines are urgently needed today.
However, investigations have shown that not only old pipelines, but even newer pipes are leaky. The reasons for this are often conceptual, like unsuitable pipe and socket materials resulting in leaky socket connections. Additionally, pipelines made of rigid materials involve the danger to break down abruptly in case of overload - leading to brittle fracture. Due to cracks and fragments, the pipeline can also lose its static loading capacity