Hydro-Logic StealthRO100 - Manual (Page 13)

Changing the RO Membrane
(cont.)
67(3
Push the new membrane back into the housing with the end that has
the two black o-rings going in first. Push firmly until it bottoms out and
can’t go in further. Then thread the cap back on tightly and reconnect the
white 1/4" tubing.
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 is the RO membrane 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 waste water is determined by the restrictor used on the drain line. The
VWHDOWK52
100 ™ is designed to waste at a ratio of 3:1
Included optional Eco-Waste Reducer can reduce this ratio to 2:1 (See instructions before use).
Optional Flow Restrictor can reduce this ratio to 1:1 +/ (Ask your dealer or call Hydro-Logic).
The flow of purified water is determined by the GPD rating of the membrane, inlet pressure, inlet temperature,
and inlet PPM. The VWHDOWK52 100 ™ has the capacity to produce 100 gallons per day, (approx. 4 gal./Hr.)
At 77º F , 60 PSI, 550 PPM. You will notice in colder areas or in the winter, when water temperatures are
lower, that the flow rate will be slower. If your inlet pressure is less than 60 psi, you may experience less
than the rated 100 GPD flow rate. A minimum of 40 psi is required to properly 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 +/ .
Inlet water that is very high in total PPM or very hard with calcium or magnesium, or high in certain
The RO membranes included with the filter can handle water up to 1000 PPM and with a hardness of 170 PPM or
10 grains of hardness per gallon. Note that this is considered both very contaminated and very hard water and
may shorten the life of your membrane.
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
Call us with questions about how to customize your water filtration needs and pre-treatment
All RO systems exhibit “TDS creep”. The first few ounces of RO water produced are higher in PPM than
after the system has run a few minutes. Take any PPM readings a full five minutes after turning the system
on to ensure accuracy.
system for optimal performance. The membrane in the is capable of removing 99% of salts that are
introduced by the softener.
contaminants such as iron or silica may shorten the life of the membrane and/or cause slower flow rates.
VWHDOWK52 100 ™
equipment.
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67(3
Flush the system for 30-45
minutes before using.