Solar diaphragm vessel with 18L capacity, ¾ inch connection - powder coated on the outside. Diaphragm with special mounting system to minimise the possibility of leakage at the flange connection to the tank. The small size of the tank, allows it to fit easily into utility rooms or bathrooms with limited space. An additional advantage of the product is that the parts in contact with the water are specially protected against corrosion. The tank will be durable and will retain its properties for a long time.