Custom coolant recovery tanks?

use this...put hose in through screw top to bottom and let it vent to atmosphere. Thats how my B2000 puke tank is. There is no pressure cap on top...think about it, if the stuff is spewing at >16psi its going to pressurize the puke tank too until that one blows at (same?) 16 psi...redundant. and if its got a 16 cap on it (tank) will it vent in to allow the coolant to suck back into radiator when it cools? vent to atmosphere and run hose to bottom so it will draw it back in when it cools. If your not an import drinker, go domestic...