| Sign | What it means |
|---|---|
| The tank fills more slowly | The earliest sign. Membrane output falls off gradually. |
| Taste or sediment is back | The membrane has stopped holding back salts. |
| Pre-filters were changed late | Chlorine from the mains destroys the membrane. If the pre-filters ran past their life, its own life was shortened. |
Membranes are not universal. RO-50S, Pro 50 and Pro 100 do not substitute for one another, and RO-31 takes its own. Before ordering, check the marking on the membrane you removed rather than the system name: the same model has been built in different versions over the years.
What is nearby
The systems themselves are in Reverse osmosis systems. Pre-filters and cartridge sets are in Replacement cartridges.
Delivery
We deliver across Israel; the cost is shown on the product page.








