We use one month, let's see how long the membrane lasts. But the cost of bottled water has already paid off. Installation is simple, no plumbing experience, I installed it myself in an hour and a half. I recommend inserting the drain into the sewer pipe, and not into the siphon (the drain into the siphon will annoy with extraneous sound) In general, I recommend! We have beer-colored water flowing from an ordinary tap. I thought that no filter would help.