Pentair Pool Products PB4RO-75, User Manual

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Arsenic Fact Sheet
Arsenic (abbreviated As) is found naturally in some well
water. Arsenic in water has no color, taste or odor. It must
be measured by a lab test. Public water utilities must have
their water tested for arsenic. You can get the results from
your water utility. If you have your own well, you can have
the water tested. The local health department or state
environmental health agency can provide a list of certified
labs. The cost is typically $15 to $30. Information about
arsenic in water can be found on the Internet at the US
Environmental Protection Agency web site: www.epa.gov/
safewater/arsenic.html.
There are two forms of arsenic: pentavalent arsenic
[also called As(V), As(+5), and arsenate] and trivalent
arsenic [also called As(III), As(+3) and arsenite]. In well
water, arsenic may be pentavalent, trivalent, or a
combination
of both. Special sampling procedures are needed for a
lab to determine what type and how much of each type of
arsenic is in the water. Check with the labs in your area to
see if they can provide this type of service.
Reverse osmosis (RO) water treatment systems do not
remove trivalent arsenic from water very well. RO
systems are very effective at removing pentavalent
arsenic. A free chlorine residual will rapidly convert
trivalent arsenic to pentavalent arsenic. Other water
treatment chemicals such as ozone and potassium
permanganate will also change trivalent arsenic to
pentavalent arsenic. A combined chlorine residual (also
called chloramine) may not convert all the trivalent
arsenic. If you get your water from a public water utility,
contact the utility to find out if free chlorine or combined
chlorine is used in the water system.
The PB4RO-75 system is designed to remove pentavalent
arsenic. It will not convert trivalent arsenic to pentavalent
arsenic. The system was tested in a lab. Under those
conditions, the system reduced 0.30 mg/L (ppm)
pentavalent arsenic to 0.010 mg/L (ppm) (the USEPA
standard for drinking water) or less. The performance of
the system may be different at your installation. Have the
treated water tested for arsenic to check if the system is
working properly.
The RO component of the PB4RO-75 system must be
replaced every 12-24 months to ensure the system will
continue to remove pentavalent arsenic. The component
identification and locations where you can purchase the
component are listed in the installation/operation manual.
Model PB4RO-75 Undersink Reverse Osmosis System JA12 • 15