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2.0 INSTALLATION
Before starting the installation, you should measure the water pressure that is avail-
able under the sink to power the Pure Water machine RO. If the pressure is less than 40-
PSIG, it is too low; and if it is 90-PSIG, it may be too high. The solution if the pressure
is too low is to use a model with a booster pump. The solution for high water pressure, is
to put a pressure regulator in the inlet water line to the house. A pressure of 60-75 PSIG
is normal.
2.1 Location of RO unit
The RO unit may be located under the kitchen sink or in the basement. A cold
water supply line must be close by. When locating the system under a sink make sure
there is adequate room for the filter module assembly as well as the storage tank. For
best performance the tank should be located as close to the clean water faucet (sup-
plied) as possible (within 20 feet).
2.2 Mounting the RO filter unit under a sink (Fig. 1.)
Mount the unit to the wall of the sink cabinet. Pre-fit the unit by positioning the
bottom of the pre-filter cartridges 2 inches off the floor of the cabinet. This clearance
is necessary to make room to remove the housings when replacing the filter car-
tridges. Mark the location of the 2 mounting holes in the mounting bracket. Install 2
mounting screws leaving 1/8 inch clearance under the screw head. Check fit the
mounting of the RO filter unit but don’t install yet.
