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DevilBoy
03/09/2008, 05:35 PM
Hi,

I have a purelyh20 optima ro/di unit. It is close to replacing the filters. It has 2 vertical canisters and 2 horizontal canisters on top of them. The lay out goes

Stage 1 - 1 micron sediment
Stage 2 - 1 micron carbon block
Stage 3 - 75 gpd RO TFC membrane
Stage 4 - Inline DI

Could i change my first stage to a 5 micron sediment. And keep a 1 micron carbon block?