Greetings to all
I'm about to install an undercounter dual filter with a 5 micron
sediment and a KDF/GAC cartridge, the water is from a private well,
due to bacteria concern a UV unit is also to be installed
It´s better to install the inline UV unit between the sediment and
KDF/GAC cartridges or after the KDF/GAC?
Place the UV sterilizer after the filters. What will happen if you have
particulate matter in your water is that it will coat the UV tube (or
its quartz protective sleeve) so that in time the UV dose to the water
is reduced below an effective level. Placing the sterilizer after the
filters slows this but doesn't prevent it.
UV sterilizers need to be cleaned periodically to remove any build up on
I run a series of filters ahead of my UV sterilizer. I start with a 100
micron filter, followed by 25 microns, followed by two 5 micron filters
in parallel, and then two 1 micron filters in parallel. I can run for
about 9 months before cleaning the quartz tube. I replace the UV tube
about every 12 months.
In my opinion UV filters can give the user false confidence. A minimum
UV dose is needed to disinfect. This is a combination of the flux from
the lamp and the dwell time that the water is in the sterilizer. As the
lamp ages or becomes dirty the flux level drops and after a while, even
though the sterilizer is "operating" it isn't disinfecting. Some of the
better sterilizers monitor the dose delivered and warn the user when the
system requires maintenance. Others don't.
Some users say that we should use a desinfection system ( like UV)
before the carbon filter as bacteria can grow on carbon.
The well tested negative for coliform bacteria, but I´m adding the UV
just in case.
I will install the UV unit After the sediment and KDF/carbon filter as
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