Maytag MWF4200AWS Technical Information download pdf (Page 31)

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3.5.7.1 POE Chlorine Dosing System Disadvantages

The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water

Filtration System. Most POE Chlorine Dosing systems:

• do not provide a physical barrier to bacteria, viruses and cysts,

• allow inactivated pathogens to be consumed after disinfection,

• have a raw water colour and organic limitation that lead to premature fouling of system lowering

the treatment effectiveness,

• create taste and odour issues at higher concentrations,

• are not very effective against parasitic cysts such as Cryptosporidium Cysts or Giardia Cysts,

• have lower disinfection properties and oxidation potential at lower temperatures,

• are affected by pH levels above 6.5 (reactions are much slower),

• are not a physical barrier to contaminants,

• do not operate during power outages,

• can have chlorine in holding tank lose effectiveness if stored open to air for extended periods of

time (>2 months).

3.5.8 Point Of Entry (POE) Sand Filtration

This treatment device has been used traditionally in municipal treatment for its capability to remove

turbidity from source waters. Consisting of sand media, particles get trapped and are flushed from the bed

regularly by reversing the flow of water to drain.

3.5.8.1 POE Sand Filter Disadvantages

The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water

Filtration System. Most POE Sand Filters:

• do not provide a physical barrier to bacteria, viruses and cysts,

• allow inactivated pathogens to be consumed after disinfection,

• have a raw water colour and organic limitation that lead to premature fouling of system lowering

the treatment effectiveness,

• do not improve taste or reduce odours.

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Maytag MWF4200AWS Technical Information Page 31