Classic 100 GPD RO/DI 4-Stage Carbon PLUS Edition


5 in stock


Classic 100 GPD RO/DI 4-Stage Carbon PLUS Edition

Classic 100 GPD RO/DI unit is designed to work with tap water that has been treated with Chloramines. Unlike Chlorine, which can be removed from water with a standard activated carbon block filter, Chloramines require a special filter cartridge. The Carbon Plus filter cartridge included in this model is rated to remove up to 98% of the Chloramines at 3 ppm and 0.5 GPM flow and treat 3,000 gallons of water. In addition, the Carbon Plus cartridge will remove up to 99% of standard Chlorine at 2 ppm and 0.5 GPM for up to 30,000 gallons of water.

The RO/DI unit itself is comprised of a 5-micron sediment cartridge, 0.5 micron Carbon Plus cartridge, 100 GPD (378L) membrane and a refillable 10 inch color-changing deionization resin cartridge. Built into the unit is an Auto Shutoff Solenoid (ASO) and Flush Valve. The built-in liquid filled pressure gauge makes it easy to know when it’s time to replace the membrane.

NOTE: Filter Cartridges and Membrane life may vary based on local water conditions and amount of use.


  • Manual flush valve allows user to increase membrane life
  • Clear housing makes it easy to view when sediment and DI cartridge should be replaced.
  • Auto shut-off valve stops incoming water supply when outflow is turned off.
  • Wrenches make it easy to access the cartridge and membrane housing.
  • Garden hose adapter make it easy to connect to a faucet
  • 1/4 inch Buddy-Fit Press Fit Connectors simplify plumbing.
  • 0-160 PSI gauge provides a pressure reading of the supply water
  • 3 meters x 1/4 inch of each Blue, Yellow and Red Polyethylene Tubing helps with plumbing setup
  • Wall mount bracket allows the unit to be hung and secured in place


100 GPD Instruction Manual


  • Dimensions with bracket: 16.5″ wide x 8.5″ deep x 18″ high
  • Weight: 6.35 kg (14 lbs)
  • Minimum water pressure: 30 PSI
  • Recommended water pressure: 65 PSI
  • Maximum water pressure: 80 PSI
  • Optimal water temperature: 77*F (25*C)

Operating Requirements:

Optimal water pressure: 40-65 PSI (if under 40 PSI a booster pump is required), Maximum water pressure: 80 PSI (if over 80 PSI a pressure regulator is required). Optimal water temperature: 77*F (25*C), Maximum water temperature: 105*F (40.5*C), Typical rejection rate: 1:3.5.

Carbon Plus Cartridge:

Chloramine and Chlorine Removal Cartridge Video