Karl Townsend wrote:

If you can access these parts out of the system, and since it's
non-potable water, I'd look at a coating like those made to coat inside
a gas tank.

Do you have a name. Need more direction to know what to order.
I'd to order it yet today.

Karl

Here are a few possibilities:

http://www.kbs-coatings.com/Tank-Sealers_c_7-1-0.html

http://www.caswellplating.com/aids/epoxygas.htm

http://www.justgastanks.com/store/in...x&cPath=21_335

http://www.summitracing.com/parts/SUM-900056/

You can probably get something at a local auto parts store.