Product Guide

How do I prevent hard water scale?
Fortunately, there are quite a few great options to choose from when looking to protect water heating equipment from scale
buildup. These solutions range in cost, maintenance and application, so it is always best to consult with water treatment
professionals before making the final decision on a water treatment solution.
Product Preservers
®
: Prevents scale by transforming dissolved hardness minerals into harmless, inactive microscopic crystal
particles.
These crystals stay suspended in the water and are passed to drain.
• This system does not add chemicals to the water or require electricity. It is virtually maintenance free only requiring a simple
filter change every two years.
Ion exchanger water softeners: Water softeners are probably the most common solution used today for eliminating hard water.
Calcium and magnesium ions are removed from the water and replaced with sodium ions. Without the calcium and
magnesium, hard water scale cannot form.
Siliphos: Interferes with the ability of (calcium and magnesium) scale to crystallize. The suspended scale stays in the water and
goes down the drain.
Where is hard water found?
Hard water is everywhere. In fact, more than 85% of American homes have hard water.
ALASKA
HAWAII
PUERTO RICO
OVER 14 gpg
10 to 14 gpg
7 to 10 gpg
3 to 7 gpg
LESS than 3 gpg
Extremely Hard
Very Hard
Hard
Moderately hard
Slightly Hard
ALASKA
HAWAII
PUERTO RICO
OVER 14 gpg
10 to 14 gpg
7 to 10 gpg
3 to 7 gpg
LESS than 3 gpg
Extremely Hard
Very Hard
Hard
Moderately hard
Slightly Hard
Tankless
Model
KJr2/
110U/
110C
K4/
310U/
310C
D2/
510U/
510C
H3M H3J H3S
H3/
540P
M50 CT-199
85°F 6.6 8 9.3 6.4 6.6 8.0 10.0 14.5 10.0
80°F 5.7 7.8 8.2 5.6 6.6 8.0 9.5 14.5 9.5
75°F 5.1 6.9 7.3 5.0 6.6 7.6 8.4 13.5 8.4
70°F 4.6 6.2 6.5 4.5 6.1 6.8 7.6 12.2 7.6
65°F 4.2 5.7 5.9 4.1 5.5 6.2 6.9 11.0 6.9
60°F 3.8 5.2 5.4 3.7 5.1 5.7 6.3 10.1 6.3
55°F 3.5 4.8 5.0 3.4 4.7 5.3 5.8 9.4 5.8
50°F 3.3 4.5 4.7 3.2 4.3 4.9 5.4 8.7 5.4
45°F 3.1 4.2 4.4 3.0 4.1 4.6 5.0 8.1 5.0
40°F 2.9 3.9 4.1 2.8 3.8 4.3 4.7 7.6 4.7
35°F 2.7 3.7 3.8 2.6 3.6 4.0 4.5 7.2 4.5
Flow Rate Based Ground Water Temperature (assume 120°F Set point)
Ground Water Temperature (°F)
Colder
Climate
Warmer Climate
100291509 Product Preservers
®
Anti-Scale System
Requires multiple units
Product Preservers
®
protects your tankless
heat exchanger from
scale formation.
Refer to the chart to the
right to properly size
for your application.
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