Deliveries of tubings for construction of sewage collector under Vistula river for “Czajka” sewage treatment plant. Pekabex as the first plant in Poland participated in a project of realization of tunnel with use of TBM method (Tunnel Boring Machine). It was the first production of such elements in Poland. Additional problem was the fact that the tunnel is located under Vistula river bottom. We have manufactured and delivered 6,000 elements in total.