Aqua-Pure APUN101 - Manual (Page 5)

SECTION 1: HOW A NEUTRALIZER WORKS
The low pH (acid) water passes through a special limestone neutralizing media and slowly dissolves the media raising the pH to approximately
7 units (neutral) or higher. Periodic media replenishment is therefore required. The frequency and amount of media replenishment depends
on the volume of water used and how acidic the water is before treatment. The lower the pH (acidity) of the water being treated, the greater
the attrition rate of the media and the slower the water should pass through the bed. The unit should be sized according to the level of pH and
existing fl ow rate. Your dealer can provide an estimate of your replenishment requirements.
APUN Series Upfl ow Acid Neutralizers virtually eliminate the possibility of media bed “cementing” because the water to be treated actually
“upfl ows” through the neutralizer media bed! This procedure requires NO electricity or backwashing.
A large fi ll-port permits easy replenishment of the “sacrifi cial” neutralizing media by the homeowner or a service technician.
There are different media types available which can be used in this APUN Series Upfl ow Acid Neutralizer System. Each is designed to
improve a particular aesthetic problem. None of them should be used to make non-potable water safe to drink. The following descriptions
indicate not only what the media is designed to do, but also points out their limitations.
Neutralizer Blend
Neutralizer media is typically a blend of calcium carbonate and magnesium oxide. This media is used to elevate the pH of acid water
and is generally used when the pH is approximately 5.5 - 6.0 units. The neutralizer media dissolves when water with a low pH passes
through. The blend is used to take advantage of the fast, vigorous pH adjusting capabilities of magnesium oxide and the slow, long-lasting
capabilities of the calcium carbonate. Neutralizer is typically not recommended when the pH of the raw water is below 5.5 units, because
the dissolve rate would be high and thus constant maintenance of the APUN Series Acid Neutralizer System would be necessary. In these
cases contact our Customer Service Department at 1-800-222-7880 for recommendations.
IMPORTANT NOTE IMPORTANT NOTE
Since the neutralizer media dissolves as it elevates pH level, it will increase the hardness of your water. If your dwelling contains a
tankless water heater, a water softener must be installed after the APUN Series Upfl ow Acid Neutralizer System to help prevent the
heater coil from plugging with hardness material.
Calcium Carbonate
Calcium carbonate can be used when only a slight pH adjustment is required (typically 6.0 to 6.8 units). Calcium carbonate is sacrifi cial
(dissolves) when adjusting pH and will thus increase hardness as well. Replenishment will be required periodically, once again depending
on raw water pH and water consumption.
IMPORTANT NOTE IMPORTANT NOTE
Since both calcium carbonate and magnesium oxide increase hardness of your water, if your dwelling contains a tankless water heater, it is recom-
mended that a water softener be installed after the APUN Series Upfl ow Acid Neutralizer System to help prevent the heater coil from plugging with
hardness material.
1
TABLE OF CONTENTS
SECTION DESCRIPTION
1 HOW A NEUTRALIZER WORKS
2 INSTALLATION
3 MAINTENANCE
4 TROUBLESHOOTING
5 SPECIFICATIONS
6 COMPONENT PARTS
7 LIMITED WARRANTY