Ro ?

[mitlik1]

Hello,

I currently have a 100 gpd RO and looking to replace RO filter. Should I go down to a 75 RO gpd with the appropriate flow restrictor or just place the with a new 100 gpd RO?

Thank you for your thoughts.

[46FiatYamaha]

if they are Dow Filmtech membranes, the 75 GPD has around a 97% rejection rate compared to 90% on the 100 GPD. Which this means if you have a DI stage, the lower rejection rate would use up the DI faster, if you don't have a DI, the water coming out of the lines would be slightly better. I have a 100 GPD with DI, low TDS tapwater and have no problems with mine

[Buckeye Hydro]

With your tank size my guess is that even 100 gpd can seem too slow. An ideal solution would be to drop to a 75, add some capacity to store DI water (an open/unpressurized/atmospheric tank) and if needed, add a booster pump to increase production speed.