Hydrotech 4 Stage Reverse Osmosis System

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  • 25 Gallons Per Day Output
  • Includes Faucet, Tank & Accessories
  • Under Sink Reverse Osmosis System


With the quality of our drinking water increasingly coming into question, people are now looking for alternative sources of quality water. Hydrotech Reverse Osmosis Drinking Water Systems provide the most convenient and economical solution. Neatly stored under the counter, Hydrotech provides you with clean and delicious water right from its own dedicated tap.

All Hydrotech Reverse Osmosis Systems include 3/8" outlet tubing to the faucet for higher flows, quick connect fittings and color-coded tubing for easy installation and servicing. All systems are backed by a two year limited warranty.

The 4VTFC25G Hydrotech Reverse Osmosis Drinking Water System combines mechanical filtration with reverse osmosis technology for effective water treatment in point-of-use applications. In addition, this model includes standard features such as a Thin Film Composite membrane, sediment filter, pre-activated carbon filter, post carbon filter, automatic shutoff, chrome air gap faucet and a metal storage tank.

Particle size removal range by filtration

View a chart of particle size removal range by filtration for thin-film composite membranes.
Bladder Tanks for Reverse Osmosis Systems
Remineralizing Kit

Neutralize the pH of your RO water
with this Remineralizing Kit.

Additional information

Weight 25 lbs
Gallons Per Day



Source Water Supply Profile Chemical Parameters Max mg/L
Community/Private Chlorinated/Non-Chlorinated Hardness (CaCO3) <350
Feed Water Pressure1 242 - 690 kPa (35-100 psig) Iron (Fe) <0.1
Temperature 4° - 38°C (40° - 100°F) Manganese (Mn) <0.05
pH Range 3.0 - 11.0 Hydrogen Sulfide (H2S) 0.00
Maximum TDS Level 2000 mg/L Residual Chlorine (Cl2) <2.0
Turbidity ** <1.0 NTU ** Nephelometric Turbidity Unit
Maximum SDI *** <4.0 *** Silt Density Index: Value stated in SDI units.

1 Pressure regulator is recommended for feed water pressures exceeding 552 kPa (80 psig).

The performance of a reverse osmosis membrane is highly dependent upon pressure, temperature and TDS. The actual volume of product water and rejection percentage will vary with differences from the test conditions that membrane ratings are based upon.

Hydrotech 4VTFC25G Brochure


Hydrotech 4VTFC25G Service Manual


Parts / Accessories

  • O-ring for Hydrotech Filter Housing

    Part#: 34201026
  • Hydrotech S-FS-19 Carbon Block Pre- and Post-Filter Cartridge

    Part#: S-FS-19
  • Hydrotech RO Vessel Wrench (for 1240 series)

    Part#: 21401240
  • Refrigerator / Icemaker Connection Kit w/ 3/8″ Tee

    Part#: ICEKIT38
  • Hydrotech TFC Reverse Osmosis Membrane, 25 GPD

    Part#: 33001068
  • Hydrotech S-FS-02, 11.5″ x 2″ String Wound Sediment Prefilter Cartridge

    Part#: S-FS-02