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These softeners conform to WQA S-100 for the specific per-
formance claims as verified and substantiated by test data.
They have demand initiated regeneration (D.I.R.) feature that
complies with specific performance specifications intended
to minimize the amount of regenerant brine and water used
in their operation. These softeners have a rated softener effi-
ciency of not less than 3350 grains of total hardness ex-
change per pound of salt (based on sodium chloride) and
shall not deliver more salt than their listed ratings. The rated
salt efficiency is measured by laboratory tests described in
NSF/ANSI Standard 44. These tests represent the maximum
possible efficiency that the systems can achieve. Operational
efficiency is the actual efficiency after the system has been
installed and may vary due to individual application factors
including water hardness, water usage, and other contami-
nates (i.e. iron) that reduce the softener's capacity.
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