VAILLANT ECOTEC PLUS UMSCHALTVENTIL REPARATURSATZ 0020020015 0020132682 BRANDNEU
PART NUMBER: 0020020015 0020132682. VAILLANT ECOTEC PRO 28. Once you have fitted this kit in the valve. In the future you only have to change the gland nut (DV.426) to repair the valve.