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US Water Aquatrol Water Softener | 076-AQT
Visit us online at www.USWaterSystems.com Give us a call at: 1-800-608-8792
Total Gallons Calculation
The US Water Systems Aquatrol valve uses a meter to count the gallons of water being
treated through the system. Once the gallons programmed in the unit has been exhausted
the system will regenerate. The total gallons of treatable water the system can produce is
based on the system size and the hardness level of the feed water. A simple calculation is
done to determine the amount of gallons to input during the programming portion of the in-
stallation. When figuring the capacity in gallons, the number of people, size and the hard-
ness level must all be considered. It is important that the number of people be inputted in
the equation below to ensure there is adequate reserved capacity in place.
ATTENTION: THIS CALCULATION MUST BE COMPLETED TO PROGRAM THE UNIT!
Total Gallons = System Capacity in Grains (See chart above) / Hardness in (GPG)
Grains per Gallon (determined by a water test) - Number of People X 75 Gallons
Example;
System Capacity: AQT-100 System/25,000 Grains (chart above)
Feed Water Hardness: 25 GPG (must be tested onsite by the end user or installer)
Number of People: 4
25,000 Grains / 25 GPG - 4 Number of people X 75 Gallons = Total Gallons
1000 Gallons - 300 Gallons
= 700 Total Gallons
700 Gallons would be inputted for Total Gallons during programming.
If the hardness level is given in ppm or mg/L, it can be converted to Grains Per Gallon by
dividing the value by 17.1.
Example;
Hardness Level 345 ppm or mg/L
345 pm or mg/L / 17.1 = 20.18 GPG. In this case round up to 21 GPG
Input the site values in the equation below to figure the total gallons value.
______ Grains / ____ GPG - _____ Number of people X 75 Gallons = Total Gallons
______ Gallons - _____ Gallons = ______ Total Gallons
