US Filter started developing the ECS system in 1998 and brought it to the market in 2000. CH began specifying ECS in the summer of 2001. ECS is a single-sourced product. It is a sophisticated system that is difficult to operate. ECS made sure that chloramines were not present in the natatorium by using potassium monopersulfate to increase the oxidation potential, so chlorine readings were not in the 10 to 15 ppm range.
ECS uses a patented process of “Continuous Breakpoint Halogenation and Peroxygenation” to remove chloramines from the pool water. This process works by allowing chlorine or a halogen oxidizer to react with organic nitrogen that bathers add to the pool. The organic byproducts produced impose a demand on the chlorine and hamper the chlorine from driving the breakpoint process. The peroxygen compound is fed at low concentrations based on the pool water demand. The peroxygen compound is more selective at reacting with the organic byproducts described. As the organic demand is oxidized, and subsequently reduced, the chlorine can effectively drive the breakpoint chlorination process. As a result, inert nitrogen gas is produced and the chloramines do not concentrate in the pool water. The odors and corrosion-inducing byproducts are eliminated.
The ECS system uses the Pulsar feeder to deliver calcium hypochlorite while proportionally feeding large doses of potassium monopersulfate. Potassium monopersulfate is shipped in 50 lb bags and is mixed with water in a bulk mixing tank.
o US Filter does not have a CH acceptable feeder for small bodies of water and spas.
Ed Lightcap from DuPont has received several complaints in which ECS has been taken out of pools because of skin irritation and chemical cost. It’s his opinion that the current ECS protocol may result in over feeding resulting in patron complaints.
The cost for an ECS system is approximately $15,000 more than traditional sanitizing systems. Chemical usage costs can expect to double.
PoolPak doubles their warranty on their HVAC units if ECS is used.
CH is currently not specifying ECS. CH’s recommendation for a secondary sanitizer is UV. If UV is too cost prohibitive, ACT may be specified.
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