Weir type bronze diaphragm valve, BSP female threaded ends acc. to DIN 259, rising stem and handwheel. Application: In cold and warm water circuits for both tap water and central heating systems. As main valve in water and gas pipelines and in various industrial applications. The valve is KIWA type approved. Remark: Model 5603 with EPDM diaphragm may not be used for hot tap water in combination with copper piping. EPDM diaphragm will be supplied if not specified especially.