GAC carbon
Stage 2 — absorbs the chlorine that damages the membrane.
Cartridge prices are quoted on request — they move with each shipment, and we will not publish a number that is stale within weeks. We confirm it before any commitment, or it sits inside the annual service contract at a fixed price.
What this stage does
Granular carbon at the second stage. It absorbs chlorine before it reaches the membrane — and that is not only about taste: chlorine damages an RO membrane over time, so this stage is genuinely protecting it.
How you know it is overdue
- A faint chlorine smell in the filtered water
- The water tastes flat or metallic
Why a range and not one number?
Because what uses a cartridge up is the volume of water passing through it and what that water carries — not the calendar. A household of six gets through one faster than a household of two, and a tank collecting more sand shortens it further. We write the reading down at every visit, so by the second or third we know your home's actual rhythm instead of guessing.
Fits these systems
If your system is on this list, this is the right cartridge.
The rest of the set — RO kitchen filter cartridges
- PP sediment 5µEvery 4–6 months
- CTO carbon blockEvery 4–6 months
- RO membraneEvery 4–6 months
- Post-carbon polishEvery 4–6 months
- Alkaline cartridgeEvery 24 months
- Mineral cartridgeEvery 24 months