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Water Analysis Report

Brief

Evaluate the effect Scale Manager has on hard water, installed in a domestic situation. Test duration 60 days.

Installation

As per Waltham Electronics instructions.

Location

A four bedroom two story residence circa 1920. Situated in Freeby Leicestershire.

Definitions

Hardness is due to the presence of salts - Magnesium and Calcium. It is expressed as the equivalent of Calcium Carbonate (CaCo3). The Total Hardness is the sum of the Carbonate Hardness and Non-carbonate Hardness, depending on whether or not the Calcium or the Magnesium is combined with one of the stronger acids to form a sulphate or a chloride. The Carbonate Hardness can largely be deposited by boiling water and so driving off the loosely combined Calcium Dioxide (CaO2). For this Carbonate Hardness accounts for at least 90% of the deposits found in domestic plumbing. Non-carbonate Hardness, precipitating by concentration, can be a major source of problems in steam-raising situations.

Turbidity

Indicates the presence of suspended matter in water, and is measured by visual or photometric comparison of a sample with a suspension of colloidal silica. It is expressed as parts per million of silica. Suspended matter is measured directly by a gravimetric technique. It does not correspond with turbidity measurement that is affected by the particle size of the matter present.

% Salts in suspension

Percentage of hardness salts ineffective.

pH

Measure of Acidity and Alkalinity

Degree Clark

Measure of water hardness.

ppm

Part per million

Evaluation of Waltham Electronics, Scale Manger 2, commenced October 14 1996.

Test Results
Water Condition Before test 1 hour 1 day 5 Days 15 Days 30 Days 60 Days
pH 7.8 7.7 7.7 7.8 7.8 7.8 7.9
Calcium ppm 290 287 285 284 281 280 280
Turbidity 2 47 98 98 80 60 43*
% Salts in suspension 0 49 87 98 92 93 91*
Degree Clark 20 15.2 12.5 10.8 10.4 9.8 7.2

*Turbidity and Percentage of salts in suspension will decrease as limescale deposits diminish

Conclusion

The results testify Scale Manager will reduce limescale by at least 90%, and would be 100% effective on Calcium Carbonate deposits.

Tests carried out by James Gordon, Water Analysis Consultant, Lecturer in water treatment, and consultant engineer to Pedigree Petfoods.

Dated: 19th December, 1996

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