Wasserhaus Deutschland GmbH· Max-Wundel-Strasse 12 · D-14469 Potsdam ·
Tel. 0331 – 505 79 43 · Fax 0331 – 505 79 52
www.wasserhaus.de · e-mail: [email protected]
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How your System works
Pre-filter stage: 1
Water from the cold water supply pipe enters the RO assembly sediment pre-filter first. This
pre-filter has a replaceable meltblown or yarn sediment cartridge. This is the 1st stage of the
system and this filter removes sand, silt and other sediments that you may or may not be
able to see in your water.
Pre-filter stage: 2
This pre-filter has a replaceable meltblown or yarn sediment cartridge. This is the 2nd stage
of the system with the higher gradation than 1st.
Pre-filter stage: 3
This pre-filter has a replaceable activated carbon granular GAC or CTO block cartridge. This
is the 2nd stage of the system and this filter removes even smaller sediments (unseen to the
human eye) as well as chlorine and other organics. Sediment and or chlorine can destroy the
RO membrane and this filter provides polished, filtered, chlorine-free water to the RO
membrane.
Reverse osmosis membrane: Stage 4
The RO cartridge is a tightly wound special membrane. The membrane removes the
dissolved solids such as calcium carbonate, chlorides, nitrates etc. and organic matter when
the water is forced through the cartridge. High quality product water exits the RO cartridge
and goes to the storage tank, or to the post-filter and RO faucet. Rejected water, with the
dissolved solids and organic matter is routed through the flow control valve and to the drain.
Storage tank
The storage tank will hold a variable amount of water, depending on the household water
pressure. A diaphragm inside the tank keeps the water pressurized to about 30psi, when the
tank is full. This pressure provides a fast flow to the RO faucet.
Post filter
After leaving the storage tank, but before going to the RO faucet, product water goes through
the activated carbon post-filter. The post-filter is an activated carbon type filter which
removes any remaining tastes or odours from the product water. Taste-free, odourfree,
clean, pure, high quality water is always available for use!
Automatic shut-off valve assembly
To conserve water, this drinking water system has an automatic shut-off valve system. When
the storage tank is filled to capacity and the RO faucet is closed, pressure closes the shut-off
valve to stop the flow to drain. Pressure in the storage tank is about half of the water supply
pressure. After drinking water is used, and pressure in the system drops, the shut-off valve
opens to allow water to flow again.
Flow control check valve
A flow control/check valve is located in the 1/4" drain line to regulate the pressure across the
RO membrane and to prevent a backward flow from the drain to the RO membrane. A
second check vale fitting is installed between the 5th stage post-filter and the storage tank to
prevent a backward flow from the tank to the RO membrane.
