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IMPORTANT: Before installing this reverse osmosis system,
make certain your water supply complies with the following
operating specifications. Failure to do so may reduce the
effectiveness of the system and will void the warranty.
SPECIFICATIONS
Thin Film Membrane:
Feed Water Pressure:
Temperature Range:
TDS:
Maximum Hardness
:
†
Sulfide, Iron and Manganese
Chlorine in Water Supply:
pH Limits:
If the hardness of your water is above 10 gpg (171 mg/L), lime
†
scale will build up rapidly on the membrane. Scale buildup will
plug the membrane and make the system ineffective. We do not
recommend these reverse osmosis systems to be used with
water in excess of 10 gpg (171 mg/L) hardness.
A maximum total level of approximately 0.01 ppm sulfide, iron
‡
or manganese is permissible. See your local dealer to reduce
these substances in your water.
PARTS INCLUDED:
Pre-assembled filter system (mounting bracket, encapsulated
membrane element, pre- and post-filter housings and pre- and
post-filter cartridges).
• Storage tank
• Inlet supply adapter
• Drain clamp
• 1/4-inch Tubing
• Tank valve
• Chrome faucet
• Feed tubing
• Sump wrench
• 3/8-inch Tubing
Tools and Materials Required
• Hand or electric drill
(cordless preferred)
• (2) Adjustable wrenches
• Slotted and Phillips screwdrivers
• File
• Safety glasses
• Drill bits: 1/8", 3/16", 1/4", 3/8"
If sink does not have hole for separate faucet:
• Center punch
• Cone-shaped grinding wheel
• 1-1⁄4" hole saw or drill bit
• Safety mask
NOTE: All tools may not be necessary for installation. Read
installation procedures before starting to determine
what tools are necessary.
GRO- 50EN
40 to 100 psi (2.75–6.9 bar)
40–100°F (4.4–37.7°C)
2000 ppm
10 gpg (171 mg/L)
:
<0.1 ppm
‡
Less than 2 ppm
3–11
(SEE BACK OF MANUAL FOR DIAGRAM)
SYSTEM DIMENSIONS:
Overall Dimensions:
15-inch W x 5
(38.1 cm W x 12.7 cm D x 43.8 cm H)
Weight:
18 lbs. (8.16 kg)
Tank Dimensions:
13
⁄
-inch W x 9 inch D x 9 inch H
1
2
(34.29 cm W x 22.86 cm D x 22.86 cm H)
Tank Capacity Max:
2.8 gal. (10.6 L)
Tank Air Pressure Empty: 5 to 7 psi (0.34 to 0.48 bar)
Tank Weight (Full):
28.5 lbs. (12.9 kg)
HOW REVERSE OSMOSIS WORKS
The GRO-2550 Reverse Osmosis (RO) System uses a semi-
permeable membrane to reduce dissolved salts and minerals,
improving the taste and odor of your water. The RO membrane
is made of layers of micron-thin film wound around a hollow
center core. Water molecules can pass through the membrane,
but dissolved salts and minerals are rejected.
The GRO-2550 Reverse Osmosis System features 4-stage
filter action. Your water supply is pre-filtered to reduce dirt
and chlorine that may foul the membrane. The RO membrane
separates this pre-filtered water into PRODUCT WATER and
DRAIN or REJECT WATER. Incoming water pressure forces
the product water through the membrane and into the storage
tank. Dissolved solids and other contaminants cannot pass
through the membrane and are sent to the drain as reject
water. When you open the drinking water faucet, product water
is drawn from the storage tank through an activated carbon
post-filter, providing you with cleaner, great-tasting water.
For each gallon of water produced, several gallons are
discharged as reject water. The storage tank can hold up to
2.8 gallons (10.6 L) of water at a time, for drinking and cooking
needs. When used under the Specifications on page 1 of the
manual, your Reverse Osmosis membranes should last 12-24
months.
CALIFORNIA PROPOSITION 65 WARNING
This product contains chemicals known to the
WARNING:
State of California to cause cancer or birth
defects or other reproductive harm.
PENTEK GRO-2550 Installation and Operation Manual • 3
⁄
-inch D x 17
⁄
-inch H
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