Installation of Replacement Parts
The Waterite Micronizer consists of a high impact Celcon®
plastic body containing two water passages. The water passage
closest to the check valve (2) contains built-in convergent and
divergent cones forming a venturi. The venturi causes air to be
drawn into the water stream when water is owing.
The second water passage acts as a by-pass. The percentage
of water ow allowed through the by-pass assembly is regulated
by the valve gate (5) and gate retainer (6) assembly. This in
turn regulates the amount of air drawn into the water stream
through the venturi. Turning the valve gate screw clockwise
forces more water through the venturi passage. This in turn
causes more air to be drawn into the water stream. In the
event that parts must be replaced, this can be accomplished by
following a few simple instructions:
1. To replace die rubber check valve (2), wet the check valve
with water ONLY and install it in the main body. Thread
the cap down snugly by hand. Do not over tighten.
Failure to lubricate the rubber properly will cause the valve
to twist inside the cap and will result in leakage of water
through the valve. If this should occur, remove the valve,
relubricate, and install it.
2. To replace the o-ring or valve gate/ gate retainer assembly,
start by lubricating the rubber o-ring with water or a silicone
oil. Carefully insert the o-ring into its seat in die bottom of
the hole in the main body. Thread the valve gate fully into
the gate retainer. Thread the gate retainer into the main
body by hand to a snug t. With the use of a suitable tool
(wrench or pliers), turn the gate retainer another 1/4 turn
into the main body. Do not over tighten.
Note: Topreventleakageatthe1”NPTthreads,useTeon
tape during the assembly of the Micronizer to the plumbing
system. Care should be taken when wrapping the tape over
the threads to ensure that no tape enters the Micronizer and
blocks the venturi.
W-988 Micronizer Parts P/N
1 Knurled Cap, Plastic WA14051
2 Check Valve M-005 WA14047
3 Main Body – blue M-988 WA14056
4 O-ring M-011 WA14059
5 Valve Gate, Stainless WA14054
6 Gate Retainer, Stainless WA14041
Waterite ® Model W-988
Installation of your Micronizer in a
Private Well Water System
1. Start Up Procedure
See gure 1 below to review a typical air injection system
conguration. The air should rst be ushed from the lter tank
and the lter media conditioned.
a. Check to verify that die Micronizer Adjusting Screw is in the
fully open position (turned fully counter-clockwise).
b. Adjust the pressure switch to ensure a 20-psi dierential
between cut-in and cut-out, (example: 20-40 psi) for the
pump.
c. Partially close valve D, turn on the pump, thereby lling the
pressure tank and slowly lling the lter tank until water
overow appears at the backwash.
d. Fully open valve D and backwash until the water to drain
appears free of air. Cycle to “Backwash-Rapid-Rinse”
several times to completely remove the air and orient the
lter bed, then turn the control handle to “Service”.
2. Adjusting the Micronizer
a. The proper adjustment of the Micronizer to provide a
colloidal suspension of the iron is a nal and important
step.
b. Close valve D. Close down the Micronizer Adjusting Screw
three turns by rotating it clockwise.
c. Open valve D and open a faucet in house. Then control
the water ow with valve D. Drain water from the pressure
tank until the pump starts, then immediately turn o Valve
D. Using the second hand on a watch, time the pump-
up cycle (i.e. the time from the low pressure cut-in of the
pump to the high pressure cut-out.) Assume a time of 99
seconds.
d. Re-open valve D until the pump starts, then immediately
shut Valve D. Determine the time of air-draw at the Suction
Nozzle. This time should be 30% of the total pump-up
time, (i.e. 30 seconds). If the air draw time is more than
30 seconds, turn the Adjusting Screw (counterclockwise)
slightly. If the draw time is less than 30 seconds, turn the
screw clockwise. Determine the total pump time after each
adjustment, since this time will change as the Adjusting
Screw is being reset.
e. If all the iron is not being removed at the 30% setting of the
Adjusting Screw, after 4 weeks, increase the air draw time
to 35% of the total pump-up time (35 seconds).
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