The connection set for 2 adjoining IBC water tank is recommended. Fits perfectly and is installed in minutes. Had only a little cut the connecting pipe. Particularly praised the supplier Rainer Taesler must be called. For the implementation of coarse to fine thread could help us not a hardware store. So this system even offers all necessary connectors, no long search. With Mr. Täsler`s help problem-regulation could be found. I thank for his kind and uncomplicated way. Thank you for this product and of course the super fast delivery.