<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1499682493412_6368">Steve,</div><div id="yui_3_16_0_ym19_1_1499682493412_6368">You had me confused when you mentioned the aluminum liner corroding. I misspoke, the aluminum liner is about 1\2 inch thick not 1 inch. But that is moot with the tanks I am talking about. The tank I am looking at is a type 4 tank witch has a plastic liner, not aluminum. The type 3 tank has the aluminum liner. </div><div id="yui_3_16_0_ym19_1_1499682493412_6368">There is still lots to consider and research. It just seems so simple to use these tanks, so there must be a problem ;-)</div><div id="yui_3_16_0_ym19_1_1499682493412_6368">Hank</div></div></body></html>