Sanitization; Disinfection Of Water Softeners; Sodium Or Calcium Hypochlorite - Pentair Fleck 4600 MECH Installer Manual

7.2

Sanitization

7.2.1

Disinfection of water softeners

The materials of construction of the modern water softener will not support bacterial growth, nor
will these materials contaminate a water supply. In addition, during normal use, a softener may
become polluted with organic matter, or in some cases with bacteria from the water supply. This
may result in an off-taste or odour in the water.
Thus, your softener may need to be disinfected after installation. Some softeners will require
periodic disinfection during their normal lifetime. Consult your installing dealer for more
information on disinfecting your softener.
Depending on the conditions of use, the softener type, the type of ion exchanger and the
disinfectant available, a choice can be made among the following methods.
7.2.2

Sodium or calcium hypochlorite

These materials are satisfactory for use with polystyrene resins, synthetic gel zeolite, greensand
and bentonites.
5.25% Sodium hypochlorite
If stronger solutions are used, such as those sold for commercial laundries, adjust the dosage
accordingly.
Dosage
Polystyrene resin: set 1.25 mL fluid per 1 L of resin.
Non-resinous exchangers: set 0.85 mL fluid per 1 L.
Brine tank softeners
Backwash the softener and add the required amount of hypochlorite solution to the well of the
brine tank. The brine tank should have water in it to permit the solution to be carried into the
softener.
Proceed with the normal regeneration.
Calcium hypochlorite
Calcium hypochlorite, 70% available chlorine, is available in several forms including tablets and
granules. These solid materials may be used directly without dissolving before use.
Do not let the disinfectant stand for more than 3 hours in the brine tank before the regeneration
start.
Dosage
Measure two grains ~ 0.11 mL for 1 L.
Brine tank softeners
Backwash the softener and add the required amount of hypochlorite to the well of the brine tank.
The brine tank should have water in it to permit the chlorine solution to be carried into the
softener.
Proceed with the normal regeneration.
Ref. MKT-IM-027 / C - 12.11.2019
Installer manual Fleck 4600 MECH - Commissioning
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