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4 MAINTENANCE
Recommended replacement frequency is listed in the table below.
Consumables
Replacement
Frequency
Performance Indicator
185/254 nm UV lamp
24 months
Increase in TOC
Final Filter
Remove
bacteria and
particles
12 months
Reduce in flow rate
When needed
Flow rate is less than 0.5
liter per minute
H Pack & U
Pack
Protects the
system
12 months
Reduce in resistivity of
ultrapure water
Polypropylene
(PP) Prefilter
Remove
particles
2 - 4 weeks
Reduced feed water flow
Softening
Cartridge
Remove Ca
and Mg ions
2 - 4 weeks
Scaling and clogging of the
RO membrane, reducing
RO production rate
Activated
Carbon
Prefilter
Remove
chlorine and
organics
2 - 4 weeks
Oxidation and clogging of
RO membranes,
reducing RO production
rate and rejection
Prefilter
Cartridge
remove
particles and
other
contaminate
3 months
pressure of water from
outlet less than 0.1 MPa.
