If this is a problem???, wouldn't it be solved by installing a check valve on each line before the T, to stop reverse flow?
See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC da...@kr-builder.org See you in Mt. Vernon - 2004 - KR Gathering See our EAA Chapter 242 at http://EAA242.org