Since the beams on the longer side of the module are moved towards the centre of the module, there is a dedicated space for drain stacks between the two modules with a width of 350 mm.
In the case of sewerage and water systems, pipes should be as short as possible. In the case of sewerage, it is very important not to design the toilet in such a way that a large diameter pipe should move through the corners of the modules in order to reach the soil stack. In other words, large sewage pipes must remain within the limits of one module.
