Specifications

5959595959
Chlorine: An efficient sanitizing chemical for spas. Watkins Manufacturing Corporation recommends the use of Sodium Dichlor-type
granulated chlorine. This type is preferred because it is totally soluble and nearly pH neutral.
Chlorine (or Bromine) Residual: The amount of chlorine or bromine remaining after chlorine or bromine demand has been satisfied.
The residual is, therefore, the amount of sanitizer which is chemically available to kill bacteria, viruses and algae.
Corrosion: The gradual wearing away of metal spa parts, usually caused by chemical action. Generally, corrosion is caused by low pH
or by water with levels of TA, CH, pH or sanitizer which are outside the recommended ranges.
DPD: The preferred reagent used in test kits to measure the Free Available Chlorine.
Halogen: Any one of these five elements: fluorine, chlorine, bromine, iodine and astatine. MPS: Monopersulfate is the non-chlorine oxidizer used with the FreshWater
Ag
+
®
Silver Ion Purification system.
Oxidizer:The use of an oxidizing chemical is to prevent the buildup of contaminants, maximize sanitizer efficiency, minimize
combined chlorine and improve water clarity. Pathogen: A microorganism such as bacterium that cause disease. pH: The measure of the spa water’s acidity and alkalinity. The recommended pH for the spa water is 7.4 to 7.6. Below 7.0 (considered neutral), the spa water is too acidic and can damage the heating system. Above 7.8, the water is too alkaline and can result in cloudy water and scale formation on the shell and heater. ppm: The abbreviation of “parts per million”, the standard measurement of chemical concentration in water. Identical to mg/l (milligrams per liter). Reagent: A chemical material in liquid, powder or tablet form for use in chemical testing. Sanitizer: Sanitizers are added and maintained at recommended residuals to protect bathers against pathogenic organisms which can cause disease and infection in spa water. Scale: Rough calcium-bearing deposits that can coat spa surfaces, heaters, plumbing lines and clog filters. Generally, scaling is caused by mineral content combined with high pH. Additionally, scale forms more readily at higher water temperatures. Shock Treatment: Also known as “super-chlorination” when chorine is used. Shock treatment is a process of adding significant doses of a quick dissolving sanitizer (MPS or sodium dichlor is recommended) to oxidize non-filterable organic waste and to remove chloramines and bromamines. Total Alkalinity: The amount of bicarbonates, carbonates, and hydroxides present in spa water. Proper total alkalinity is important for