Zestaw modernizacyjny z wkładką obejściową do modeli HGU1 oraz HGU2

Bypass insert upgrade kit designed for hydraulic groups HGU1 and HGU2. Allows updating or replacing the bypass insert, improving the operation of the heating system. The kit includes necessary parts for installation. Suitable for service maintenance and repair of boiler equipment, ensures correct coolant circulation and overload protection.