11
Disinfection of Water Conditioning Systems
The materials of construction in the modern wat er
conditioning system will not support bacterial growth, nor
will these materials contaminate a water supply. During
normal use, a cond itioner may b ecome fouled with
organic matter, or in some cases with bacteria from the
water supply. This may result in an o ff-taste or odo r in the
water.
Some conditioners may need to be disinfected after
installation and some conditioners will require periodic
disinfection during their normal life.
Depending upon the conditions of use, the style of
conditioner, the type of ion exchanger, and the disinfectant
available, a choice can be made among the following
methods.

Sodium or Calcium Hypochlorite

These materials are satisfactory for use with polystyrene
resins, synthetic gel zeolite, and bentonites.

5.25% Sodium Hypochlorite

These solutions are available under trade names such as
Cloroxa. If stronger solutions are used, such as those sold
for commercial laundr ies, adjust the dosa ge accordingly.

1. Dosage

•Polystyrene resin; 1.2 fluid ounce (35.5 mL) per
cubic foot.
•Non-resinous exchangers; 0.8 fluid ounce (23.7
mL) per cubic foot.

2. Regenerant tank conditioners

A. Backwash the conditioner and add the
required amount of hypochlorite solution to
the well of the regenerant tank. The
regenerant tank should have water in it to
permit the solution to be carried into the
conditioner.
B. 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.

1. Dosage

A. Two grains (appr oximately 0.1 oun ce (3 mL)
per cubic foot.

2. Regenerant tank conditioners

A. Backwash the conditioner and add the
required amount of hypochlorite to the well of
the regenerant tank . The regenerant tank
should have water in it to permit the chlorine
solution to be carried into the conditioner.
B. Proceed with the nor mal regeneration.
a. Clorox is a trad emark of the Clorox Company.