15
General Filter Maintenance
ADDING POTASSIUM PERMANGANATE
POWDER TO FEEDER TANK
It is very important to always have some potassium
permanganate powder in the feeder tank. If the filter
goes too long without a regeneration with potassium
permanganate, the filtering mineral will lose its man-
ganese coating. Replacing the filter mineral bed can
be costly. Be sure to check the feeder tank every 2-4
weeks, and stir the potassium permanganate powder
to keep it from solidifying. Refill it with powder if less
than an inch remains. After filling, check the tank
overflow drain hose to be sure it is over the floor drain
(see step 6, page 8).
HOW LONG DOES THE POTASSIUM PERMAN-
GANATE LAST?
Using 2 ounces of powder each regeneration (at 1
minute fill setting), 6 pounds of potassium perman-
ganate powder will last for about 48 regenerations.
Divide 48 by the number of regenerations needed
each week. The answer is the approximate number
of weeks the potassium permanganate should last.
The 2 minute fill setting uses 3 ounces of powder,
and 3 minutes uses 4 ounces.
CLEANING THE NOZZLE & VENTURI
A clean nozzle & venturi (Fig. 29) is needed for the fil-
ter to work properly. The nozzle & venturi creates the
suction to move potassium permanganate solution
from the feeder tank to the mineral tank during regen-
eration. It will not work if it becomes plugged with
sand, silt, dirt, etc. The filter mineral will not be prop-
erly cleaned, and oxidizing capacity restored.
To get access to the nozzle & venturi, remove the fil-
ter’s top cover. Make sure the filter is in “service”
cycle (no water pressure at nozzle and venturi).
Then, while holding the nozzle & venturi housing with
one hand, unscrew the cap. Lift out the screen sup-
port and screen, then the nozzle and venturi. Wash
and rinse the parts in warm water until clean. If need-
ed, use a small brush to remove iron or dirt. Also
check and clean the gasket.
Carefully put all parts back in place in the correct
order. Be sure holes in gasket align with holes in the
housing. Lubricate the o-ring seal with silicone
grease and put in place. Install and tighten the cap,
BY HAND ONLY. DO NOT OVER-TIGHTEN AND
BREAK THE CAP OR HOUSING.
NUMBER OF FULL WEEKS THAT 6 LBS. OF
POTASSIUM PERMANGANATE POWDER LASTS
Number of Regenerations
Each Week
Fill Cycle Minutes
1
2
3
1
48
32
24
2
24
16
12
3
16
10
8
4
12
8
6
5
9
6
4
6
8
5
4
7
6
4
3
Note: The refill container has 6 pounds of potassium
permanganate powder.
PROTECT THE FILTER FROM FREEZING
If the filter is installed where it could freeze (summer
cabin, lake home, etc.), you must drain all water from
it to prevent possible freeze damage.
FIG. 29
Screen
Support
Cap
O-Ring Seal
IMPORTANT:
Be sure the
small holes in the gasket
are
centered directly over
the small holes in the
nozzle & venturi housing.
Screen
Nozzle &
Venturi
Gasket
Nozzle & Venturi
Housing
*Flow Plug
*
Install with numbered side
up and concave side down.
