State Water Heater Water Heater Brochure

Tankless Model 110/U/C 310/U/C 510/U/C 140 240 340 540P 910 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
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
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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