Sorry. Typo there. The correct number is SW30-2521 not 2520. Dow's
MSRP for the SW30-2521 is $250.00 and the srteet price is as low as
$153. Lowest price I have seen so far is at:
http://www.bigbrandwaterfilters.com/membranes.html

Only for my education....
I have read somewhere about "home made" watermakers... but I don't rember
where...
I have made my google homework... :-) No result.
Do you have any reference, link, info?
I am interested in one small, simple unit for a sailboat...

Tank you
Paolo