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REPLACING THE PRE-FILTER AND POST-FILTER CARTRIDGES
1st Stage Pre-Filter and 2nd Stage Pre-Filter Cartridges:
The cartridge should be replaced every 6-12 months. If your
water contains a high amount of sediment, it may be necessary
to change the 1st stage cartridge more frequently. If your water
contains a high amount of chlorine, it may be necessary to
change the 2nd stage pre-filter more often.
1. Turn off incoming water supply and valve on the storage
tank. Place a tray under the system to catch any water that
spills during removal of the filter housings.
2. Open faucet to release pressure.
3. Unscrew bottom of filter housings from caps. Use the filter
wrench. Discard used cartridges.
4. Remove black rubber O-rings from grooves in housings.
Wipe grooves and O-rings clean; set O-rings aside.
5. Rinse out housings and fill each 1/3 with water. Add 2
tablespoons of bleach and scrub with non-abrasive brush or
sponge. Rinse thoroughly.
6. Lubricate each O-ring with a coating of clean silicone grease.
With two fingers, press each O-ring securely into groove
below the threads of the appropriate housing.
The rubber O-ring provides the
CAUTION:
water-tight seal between
the cap and the bottom
of the housing. It is
important that the
O-ring be properly
seated in the groove
below the threads
of the housing or
a water leak could
occur.
1/4" Feed Tube
10 • GRO-2550 Installation and Operation Manual
7. Insert cartridges in the bottom of the housings. Make sure
cartridge slips over standpipe in the bottom of the housing.
NOTE: Be sure to install cartridges in proper housings (see diagram
below).
8. Screw bottoms of housings back onto caps securely; do not
over-tighten. Turn on cold water supply.
Check for leaks. Continue to check periodically to make sure
no leaks develop.
4th Stage Post-Filter Cartridge: post-filter should be replaced
every twelve months.
1. Turn off incoming water supply and valve on the storage
tank. Place a tray under the system to catch any water that
spills during removal of the filter housings.
2. Open faucet to release pressure.
3. Remove filter from bracket and discard.
4. Remove tubes from fittings by pressing in collar around the
fitting while pulling the tubing out with your other hand.
NOTE: If quick connect fittings need to be installed, tape
threads of fittings with 3 wraps of plumber tape and
attach to filter.
CAUTION:
NOTE: The filter has an arrow on it showing the direction of
flow. The tee fitting connects to the inlet side of the filter
and the elbow fitting attaches to the outlet side.
NOTE: Hand tighten fittings, then tighten with wrench 1/4 turn.
5. Attach 4th stage filter to bracket with the tee fitting on the
right hand side.
6. Attach tubes to fittings by pushing in until the tube stops.
Check to see if tube is in place by trying to gently pull tube out.
3/8"
Drain
Tube
1/4" Storage
Tank Permeate
Tube
Ensure the tape is not touching O-ring on the fitting
or a leak may occur.
3/8" Faucet Permeate Tube
1/4" Faucet Drain Tube
Carbon (2nd Stage) Prefilter
Sediment (1st Stage) Prefilter
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