That's another good idea. But once again my problem would be when I switch tanks. I'm ROing the truck tank into the main holding tank, then concentrating the holding tank (which is also fed by on-site maples), then going to do a wash with the wash tank. A shutoff on the unit solves the problem.
Gary / Zena Crossroads / 42˚ 00' 24" N / Hobby in Early '70s, Addiction since 2014
175+ taps on 3/16 (60 of which are on two Lunchbox Vac/Releasers)
12x34 timber framed sap house w/attached 10x34 shed roof for storage
2 x 6 Smoky Lake hybrid pan on Corsair arch with AUF/steam hood/preheater/concentric exhaust
7.0 KW Sun Power PV System, Smokey Lake Filter Press/Steam Bottler, Modified NGMP RO - 2 4x40 posts 200 gph