I posted this in RORT but thought I would post it here as well.

As I've mentioned elsewhere, I only have a DIY, (Do It Yourself),
budget and considering the options, I see ultraviolet water treatment,
(combined with filtration), to be my best option for use in my travel
trailer, (See Links Below). Using filtration followed by UV light
means retaining the minerals in the water, which are removed in most
other forms of water treatment. And UV is a proven, effective and (in
this case, being the poor person I am) an affordable means of
achieving that end.

The alternatives as I see them include:
1) A water distiller, (I don't know of any that are not electric),
which uses alot of power, removes all minerals and are pretty slow and
cumbersome.
2) A reverse osmosis unit, which I don't know alot about, but like the
water distillers, I'm sure they aren't cheap to buy, or operate.
3) Water filteration alone, which I simply wouldn't trust, or with
addition of clorine, which doesn't exactly leave me salivating at the
thought.

My intentions are:
1) To use a sand filter, (cheap).
2) Followed by an activated charcoal filter, (also cheap), with
materials at hand, or easy to obtain, such as activated charcoal
available for aquariums at most pet stores.
3) Which will then be followed by the ultraviolet tube. I expect that
because this unit will be used in a non-stationary situation within a
travel trailer, I will need to use a quartz tube to protect the UV
tube from the water and I hope to be using a stainless steel housing
for the device, (depending on cost and availability).

This unit doesn't need to have a life expectancy longer than the
trailer, or myself, so I think I can go with whatever seems most
reasonable and practical.

At the URL below you can download a Word Document with drawings and
pictures of AquatUVo used in Mexico and the family-shared UV Tube used
in Sri Lanka.

http://www.google.ca/url?sa=t&ct=res&cd=6&url=http%3A%2F%2Feetd.lbl.gov%2Fstaff%
2Fgadgil%2Fdocs%2FUVTube-Final-51006.doc&ei=DGbGRdv2HKDkgQOeh_HzCw&usg=__3cqyj0b
bzBb-JLjanwmqXcJJMdk=&sig2=V_Y5pko0Ywa4DCMMrEYhzA

Also see:

http://uvtube.berkeley.edu/about/faq Re: Sand Filter.
and:
University of Berkley Ferro Cement UV-Tube design.
PDF File:
http://www.google.ca/url?sa=t&ct=res&cd=3&url=http%3A%2F%2Fwww.coe.berkeley.edu%
2Fbisv%2F2005%2Fpeletz.pdf&ei=MW_GRaLHGqTUgQP51ODwCw&usg=__u95rfr2UWYz05lHAJtkQk
BsUqzc=&sig2=QyMVMYmnIiFPzOBEBQU0RQ

I thought I would follow up on my previous posts on this topic, just
incase anyone else was looking for this kind of information. It took
me hours to hunt this down on my painfully slow dialup connection.
Enjoy!

D.BC