At 01:26 AM 5/18/2011, neil n wrote:
>least a few times. That said, if I'm low on drinking water, tank water
>is boiled for coffee or tea. Otherwise, it's for dishes and brushing
>teeth.

Why?  The Westy water tank is a big polyethylene bottle.  You buy
milk in the supermarket in a big polyethylene bottle (you buy little
bottles of water in PETE bottles that aren't nearly so chemically
  benign, according to stuff I've heard on PBS lately).  It uses
food-grade hoses to the faucet.  It's nicely sealed up.  Sanitize it
occasionally, put clean water in it, it will stay clean for a long time.

If you want a shock, have some cultures taken of the Westy water
system, and similar cultures taken of your portable water bottle
after you've been drinking from it all day.

Yours,
David