Replacement Filters and Membranes
The reverse osmosis plants' filter inserts are consumable parts and should be exchanged every 6 to 12 months. The exact exchange time depends on several factors. The more water runs through your plant, the sooner the filters should be replaced.
Membranes are the heart of reverse osmosis plants because the whole process of reverse osmosis takes place there. They fully absorb all removed particles and microorgainsms and thus have to be exchanged regularly.