3
Water Supply
Unlike other iron filters that do not use chemicals to oxidize the iron, the OXY2 iron filter does not require
additional devices such as air compressors, venturis, solenoids, pressure switches or pressure tanks. This filter
will function properly when the water supply is furnished by a jet pump (5 gpm minimum), submersible pump,
variable speed (constant pressure) pump or community water supply. As with all other filter systems, however,
it is imperative that the well pump provides enough flow rate for the filter to adequately backwash. In order to
ensure sufficient backwash flow rate the following pumping rate test should be performed prior to installing the
iron filter.
1. Make certain no water is being drawn in the house.
2. Open spigot nearest pressure tank.
3. When well pump starts, close spigot and measure time (in seconds) to refill pressure tank (well pump
turns back off). This is Cycle Time.
4. Using a container of known volume, draw water from pressure tank and measure how many gallons
until the pump turns back on again. This is Draw Down.
5. Calculate pumping rate by dividing draw down by cycle time and multiplying by 60.
Pumping Rate (gallons per minute)
Example: Draw down is 8 gallons
Cycle time is 65 seconds
Location Considerations
The proper location to install the OXY2 filter will ensure optimum filter performance and satisfactory water
quality. The following factors should be considered in selecting the location of the iron filter.
1. The filter should be installed after the pressure tank (private well system only).
2. The filter should be installed as close as possible (preferably within 15’) to an adequate floor or
laundry drain capable of handling the backwash cycle volume and flow rate (refer to unit
specifications).
3. All water conditioning equipment should be installed prior to the water heater. Water temperatures
exceeding 100°F can damage the internal components of the control valve and filter tank. An
expansion tank may need to be installed in the line to the water heater in order to allow for thermal
expansion and comply with local plumbing codes.
4. The filter should not be subject to freezing temperatures.
5. The filter should be installed before a water softener (if required).
6. Never install a cartridge type filter prior to the OXY2 iron filter. Any cartridge or in-line filter (if
desired) should be installed after OXY2 filter. This will prevent restricting the water flow and
pressure available for backwash.
7. Appliances requiring extended periods of continuous or high flow water use (i.e. geothermal heat
pumps, swimming pools, lawn irrigation, outside hose bibs, etc.) should bypass the filter and a
spring check valve should be installed on the filter inlet to prevent backflow of air from the filter tank
(see installation diagram Fig. 1).
7.4 gpm (gallons per minute)
Pre-installation Instructions (cont.)
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