Final element, the filter FLF allows the production of sterile water, subject to periodic passages in autoclave.
A sterilisation of 30 min. in 120°C or 10 min. in 134°C is sufficient to stop the development of all the vegetative components. This sterilisation must be more frequent if the system is few used.
Envelope completely molded in polypropylene, with hydrophilic polyethersulfone menbranes.