Use and Care Manual

Installation Instructions
Residential Reverse Osmosis Drinking Water System
Page 7 of 8
The formula is as follows:
Reject Ratio =
Reject Rate
Product Rate
PERCENT RECOVERY
The percent recovery is another way to measure the
amount of water produced compared to the amount of
water which is actually used.
The formula to determine percent recovery is as follows:
Percent Recovery =
Product H
2
O Rate x 100%
Feed H
2
O Rate
NOTE: Product water rate is the sum of the feed water  ow
rate and reject water  ow rate.
For example:
Product water rate =10 gpd
Reject water rate = 40 gpd
Feed water = (10 gpd + 40 gpd) or 50 gpd
Percent Recovery = 20%
Water pressure and temperature
Product water quality and production of RO systems is
dependent on pressure and temperature. Typically, RO
membranes are treated at standard conditions of 77°F
(25°C) and 60 psi (4 bar) discharging to atmosphere.
In general, the higher the pressure di erential and
temperature, the greater the quality and quantity of
water produced. These factors should be considered
when sizing RO systems for a particular application.
Quick Connect  ttings
Many RO systems utilize Quick Connect  ttings. These
user-friendly  ttings provide superior performance
and may be provided with this system. Proper use of
these push-in  ttings is shown below. Along with these
 ttings, all tubing selected must be of high quality and
must be cut with a plastic tube cutter or sharp razor with
a clean, square cut.
Should a leak occur at a  tting, the cause is generally
defective tubing. To  x a leak, relieve pressure, release
tubing, cut o at least 1/4” from the end (square cut),
reattach the tubing and con rm the connection is leak
free. Each time a new connection is made, it is advisable
to cut o 1/4” from the end of the tubing using these
 ttings.
Conventional compression  ttings
If Quick Connect  ttings are not used, it is essential to
install inserts at the ends of all tube connections when
conventional  ttings are used.