14
Reverse Osmosis Water Treatment System
Copyright © Puretec Pty Ltd 2020
To Care for the RO System
The components of the RO system are designed to function with minimal maintenance.
However, the membrane elements and filters will need to be replaced on a regular schedule.
For optimal performance the system should be flushed for 2 minutes if periods of inactivity
extend past six hours.
Replacement of Prefilter and Post Filter
The carbon/sediment prefilter reduces sediment and certain chemicals, such as chlorine, from
the water. Depending on water use and the amount of impurities, this filter should be replaced
every six to twelve months for point-of-use applications.
Whenever the prefilter is replaced, the post filter should also be replaced.
Installations using more than 20 gallons product water per day should install external filters (not
supplied) to reduce chlorine and sediment larger than 10 microns.
Replacement of RO Membrane Elements
The functional life of the RO membrane elements will vary based on feed water quality. Product
water should be tested periodically to verify the membrane elements are performing properly.
For most point-of-use applications, the RO membrane elements should be replaced every two
to four years.
Note
: Softened water is recommended for optimal system
performance and RO membrane element life.
Replacement of the Prefilter, Post filter, and RO Membrane Elements
1. Turn off the water supply to the RO System.
2. Reduce system water pressure by opening the faucet.
Caution
: Even with the water supply turned off the membrane and
prefilter sumps will contain a considerable amount of water. By
positioning the RO assembly in a sink or tub, most of the water will
be contained.
3. Disconnect locking bar and place the fittings (with tubing
still connected) into a tub or bucket.
4. Move system into a contained area, such as a sink or tub.
5. Remove the support leg from the three sumps and unscrew the top sump as shown
to access the prefilter element. The support leg functions as a wrench to loosen the
sump, Figure 12.
RO Installation Guide
will need to be replaced on a regular schedule.
For optimal performance the system should be flushed for 2 minutes if
periods of inactivity extend past six hours.
REPLACEMENT OF PREFILTER AND POSTFILTER
The carbon/sediment prefilter reduces sediment and certain
chemicals, such as chlorine, from the water. Depending on water use
and the amount of impurities, this filter should be replaced every six
to twelve months for point-of-use applications.
Whenever the prefilter is replaced, the postfilter should also be
Installations using more than 20 gallons product water per day should
install external filters (not supplied) to reduce chlorine and sediment
larger than 10 microns.
REPLACEMENT OF RO MEMBRANE ELEMENTS
The functional life of the RO membrane elements will vary based
on feed water quality. Product water should be tested periodically
to verify the membrane elements are performing properly. For most
point-of-use applications, the RO membrane elements should be
replaced every two to four years.
NOTE: Softened water is recommended for optimal system
performance and RO membrane element life.
REPLACEMENT OF THE PREFILTER,
POSTFILTER, AND RO MEMBRANE ELEMENTS
1. Turn off the water supply to the RO System.
2. Reduce system water pressure by opening the faucet.
Even with the water supply turned off the membrane and
prefilter sumps will contain a considerable amount of
water. By positioning the RO assembly in a sink or tub,
most of the water will be contained.
3. Disconnect locking bar and place the fittings (with tubing still
connected) into a tub or bucket.
4. Move system into a contained area, such as a sink or tub.
5. Remove the support leg from the three sumps and unscrew the
top sump as shown to access the prefilter element. The support
leg functions as a wrench to loosen the sump, Figure 13.
NOTE: There is no need to disconnect tubing from fittings on the
manifold. Remove locking bar and pull fittings out. Lubricate
O-rings with silicone prior to re-assembly.
NOTE: If changing only the prefilter and postfilter, the other sumps do
not need to be removed.
If changing the membrane elements, the prefilter and
postfilter should also be changed.
6. Remove exhausted prefilter and discard.
The person handling the filters and membrane elements
must have clean hands to keep the system sanitized. The
use of sterile/latex gloves is recommended.
7. If changing membrane elements:
a. Remove membrane sumps. Remove and discard used
elements.
b. Remove new elements from packaging.
Figure 13
Fig. 12
