The HENDI pre-filter for the reverse osmosis filter 1.0 is a replacement cartridge designed only for the HENDI reverse osmosis filter 1.0. A complete filter with cartridges allows to obtain chemically clean water, which is called chemically clean - a reduction of impurities and hardness by approximately 95%. Carbon-sediment cartridge - 3/4" connection. Reduces the content of mechanical impurities and free chlorine in the input water - protects the osmosis membrane.e Environment - activated carbon and cord cartridge. Lifetime: about 6 months (11,000 liters) depending on water quality. Maximum flow rate: 3.8 l/min. Maximum pressure: 6 bar.