On Aug 8, 7:39*pm, Tony Hwang wrote:
Hmmm,
I installed under the sink 6 stage filtering unit.

Wow can you elaborate? TIA.

Last stage is UV
light tube. According to my sister and brother(both chemists, brother
works for city water demartment) The filtered water is at least 99%
pure. It produces enough water per day for drinking and cooking.
Best thing is it does not have chlorine smell or funny taste. Even our
dog and cats drink that water.

Where you find your UV light? TIA.
99% ? Shouldn't you expect something like 99.9999%?
Provided the end water is "pure" the less chlorine the better
definitely.