The HERZ four-way valve product group has been complemented with the new models, HERZ VTA-50 and HERZ VUA-50 with a pipe separation of 50 mm and M 30 x 1.5 mm thermostatic connection threads. To guarantee a uniform visual effect and the benefits of the new, slimline design for the whole product group, the well-known HERZ VTA-40 and HERZ VUA-40 four-way valves (pipe separation 40 mm) have been available in new improved model variants since the end of 2005. The altered dimensions, especially for the VTA-40 model, represent a decisive improvement in the application: e slimmer shape makes wall installation easier as 90° rotation and horizontal installation are now possible. Horizontal as well as vertical supply pipe can therefore be connected. Due to the sparge pipe having been made uniform, so that it is now the same for all models, the number of replacement parts is now reduced, which leads to simplification when retrofitting. All technical characteristics remain unchanged. More precise technical details are to be found in the current HERZ product catalogue. e application technology department will be happy to send you a detailed summary of the product modification upon request. ATTENTION! Important installation note: