Elements of the YTONG system made of aerated concrete can be successfully used to enclose all kinds of water and sewage risers.. You can in the case of, when the pipes are spaced narrowly apart, use typical U-fittings. When the pipes are spaced wider, it will be necessary to use aerated concrete tiles with a thickness 5 cm glued with mortar in a typical arrangement of brickwork. In both cases, elements in every second or third layer should be anchored to the wall with perforated stainless steel sheets.