I'm thinking about getting a RO/DI system. Still talking about it with my dad. Here are the specs of the RO/DI.
$240.00 - OCEAN REEF + 2 SIX STAGE 75 GPD RO/DI
* All systems are made to order with clear 10" canister housings
* Stage One 5 micron poly sediment filter
* Stage Two 5 Micron Matrikx NSF rated CTO/2 Workhorse carbon block
* Stage Three 0.6 Micron Matrikx NSF rated chlorine guzzler carbon block
* RO membrane 75 GPD Dow Filmtec
* Stage Five refillable cartridge with color-changing DI resin
* Stage Six refillable cartridge with color-changing DI resin
* 100 PSI pressure gauge
* Auto shut-off (Requires Float Valve or Switch To Work)
* Dual TDS meter
* Membrane flush valve
* Quick connect fittings
* Self Piercing Saddle Valve Water Supply Connection
* Drain Connection
* Filter wrench to make cartridge replacement easy
Also going to get a addon. $12.00 - RO BYPASS VALVE KIT
THIS IS A BYPASS VALVE KIT FOR MAKING RO DRINKING WATER.
Here is a picture of the unit.