if your water hardness is 5

20 gallon NSF certified reverse osmosis pressure tank

10" big blue filter housings

Each time you short cycle

We do not like to add the RO/RODI Booster Pump on to household pressure which already exceeds 50 PSI

Merlin Membranes & Filter Pack VALVE if your water hardness isMerlin Membranes & Filter Pack This Complete Merlin Membrane and Filter Pack includes: Two GE Merlin Reverse Osmosis membranes that are required for membrane replacement in the Merlin unit, plus a 17" Carbon Prefilter. These 3 filters will get your Merlin Evolution RO 1000 system working like new! For use on the Evolution RO 1000, GE Merlin, and other Watermaker systems under different branding. These Membranes and Filters are guaranteed to fit