Pack of three 20" granular activated carbon (GAC) water filters for reverse osmosis and domestic water filters.
Pack of three 20" granular activated carbon (GAC) filters, which is generally used as the second stage of filtration. The first would be the PP sediment filter, and the third and final would be the carbon block (CTO) filter.
In the GAC filter, water flows through a filter full of activated carbon granules which remove chlorine, organic contaminants, chemicals, and undesirable tastes and odours. This is based on providing maximum surface area of carbon granules exposed to your water.
It is important that this filter is fitted with the rubber seal upwards (most filters are water fed from the top).
We recommend that these filters are changed every 1 to 6 months depending on output capacity & actual use and water output. The idea is to keep chlorine off your membranes.
This does depend upon the throughput of your RO system. Do not exceed these times or you may find that chlorine has oxidised your membranes requiring a complete replacement of RO membranes.
After fitting the filters, disconnect the pre-filter output from your RO housing and allow to flush approximately 5 - 10 minutes reconnect and start making water. This helps remove any particles from the new carbon filters and protects your membrane, if you get the small particles of carbon on your RO membrane is will cause the membrane to clog and results in early reduced flow rates.
(please note it is quite normal for all new carbon filters to lose some carbon dust)
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