HydroLogic Stealth RO 150 | Reverse Osmosis Filter System | 150 GPD

Hydro-Logic® Stealth RO™ 150

Removes 98%+ of all contaminants in your tap water. Leading the industry in efficiency, the Stealth has a 2:1 waste to product water ratio. Optional 1:1 ratio flow restrictor saves 50% more waste water. Customized for gardening and hydroponics. The Stealth RO™ 150 produces 150 GPD of ultrapure water. Includes: 3-stage RO unit, 1 RO membrane, carbon filter, cleanable sediment filter, automatic shut-off cartridge, wall mountable metal bracket, garden hose connector, inline shut-off, 8 ft RO and drain line, 5 ft inlet line, filter wrench and instructions. Membrane Power Flush Kit now included.  

• Built in the USA
• Unit size: 18.5" x 16" x 6"
• Weight: 10.8 lbs

Important Information & Performance Parameters

Reverse Osmosis is the most efficient and cost-effective way to remove the majority of all contaminants from your water. The key component of the system are the RO membranes composed of tightly wrapped sheets of a semi-permeable material. Under pressure, the membrane allows pure water to pass through it and rejects, or flushes away, most impurities down the drain. That is why all RO systems have a certain amount of wastewater. The ratio of wastewater is determined by the Flow Restrictor installed in the Flow Restrictor/Flush Kit Assembly. The system comes with a choice of 1:1 and 2:1 Flow Restrictors. 

The flow of purified water is determined by the GPD rating of the membrane, inlet pressure and inlet temperature. The has the capacity to produce 150 gallons per day (approx. 6.25 gallons/hour when your inlet water is at 77°F, 65 psi, 500 PPM). If your inlet pressure is less than 65 psi, you may experience less than the rated 150 GPD flow rate. A minimum of 40 psi is required to operate the system. The higher the inlet pressure, the better the flow. A booster pump is available as an option in case of low pressure and is necessary if your pressure is below 40 psi.

You will notice that in colder areas or in the winter, when water temperatures are lower, the flow rate will be slower.

Inlet water that is very high in total PPM or very hard with calcium or magnesium, or high in certain contaminants such as iron or silica, may shorten the life of the membranes and/ or cause slower flow rates. The RO membranes can handle inlet water up to 1,000 PPM and with a hardness up 10 grains per gallon (170 PPM). Note that this is considered both very contaminated and very hard water and may result in a shorter membrane lifespan. At these levels of contamination and hardness, and especially beyond, you may consider pre-treatment in the form of a water softener or other equipment. Softened water can be run through your system for optimal performance. The membrane in the is capable of removing up to 99% of salts that are introduced by the softener. Contact HydroLogic for more info at 888-426-5644.

All RO systems exhibit “TDS creep. ” The first few ounces of RO water produced are higher in PPM than after the system has run for a few minutes. Take any PPM readings a full five minutes after turning the system on to ensure accuracy.

What's Included?

1. Stage 1—Pleated, Cleanable Sediment filter Reduces dirt, sediment, silt, rust, etc.

2. Stage 2—Green Coconut Carbon or KDF85/Catalytic Carbon upgraded filter Reduces chlorine and other toxins

3. Stage 3—150 GPD Reverse Osmosis Membrane Reduces PPMs of Total Dissolved Solids

4. Inlet Pressure Gauge with safe zones Shows dynamic line pressure and optimal operating zones

5. 5' white inlet tubing, 8' blue product tubing, 8' black wastewater tubing Food grade LLDPE (linear low density polyethylene) tubing

6. Inline Shut-Off Valve Turns system on/off manually

7. Double-Ended Filter Housing Wrench Large end for filter housing, small end for membrane housing cap

8. Flow Restrictor/Flush Kit Assembly with 1:1 and 2:1 Flow Restrictors Determines waste to purified water ratio

9. Garden Hose Connector

Membrane Operating Limits: Very Important

• MEMBRANE TYPE: Thin Film Composite

• MAXIMUM OPERATING TEMPERATURE: 113° F (45° C)

• MAXIMUM OPERATING PRESSURE: 100 psi

• MAXIMUM FEED FLOW RATE: 2 GPM

• MAXIMUM TDS: <1000 PPM

• MAXIMUM HARDNESS: <10 Grains Per Gallon (170 PPM)

• PH RANGE, CONTINUOUS OPERATION: 2–11

• MAXIMUM FEED WATER TURBIDITY: 1 NTU

• MAXIMUM FEED SILT DENSITY INDEX (SDI): 5 SDI

• CHLORINE TOLERANCE: 0 PPM

• CHLORAMINE TOLERANCE: 0 PPM

• MANGANESE TOLERANCE: 0 PPM

• IRON TOLERANCE: <1 PPM

• SILICA TOLERANCE: <10 PPM

NOTE: Operating your membranes outside of the parameters voids the warranty. Use only with microbiologically safe water. Do not use with water of any unknown origin or water quality. When in doubt contact HydroLogic to order a water analysis kit.

Additional Info

User Manual

Filter Replacement Guide

Q: What micron rating are these pleated sediment filters?
A: 5 microns

Q: How many gallons per hour does it produce?
A: The Stealth 150 can produce 6.25 GPH under proper conditions. Low pressure, cold water, poor water quality and old filters are some of the common causes for lower flow rates.

Q: How long is the warranty on this pump?
A: The warranty for the Stealth RO Booster Pump is 1 year from the original date of purchase.