The components in contact with water are non-toxic, including a filter refill with an EASY CHANGE system (activated carbon and colloidal silver). It has an internal stainless steel coil, withstanding pressure from 3 to 40 mca. Installation can be done internally or externally. It is recommended to change the refill every 6 months or 3,000 liters. Description 1 BRX 40 Electrozinc-plated 110 Volts 2 BRX 40 Electrozinc-plated 220 Volts 3 BRX 40 Stainless Steel 110 Volts 031294 4 BRX 40 Stainless Steel 220 Volts 031295 Dimensions 96cm x 33cm x 28.5cm (h x w x d) Weight 13.5Kg Refill We recommend changing the refill every 6 months or 3,000 liters