Evaporative Check Valve

ROLLOVER/VENT VALVE
Tank pressure to open (max.) 7.0 kPa (1.0 psi)
Air pressure to vent tank (max.) 4.9 kPa (0.7 psi)

TWO-WAY CHECK VALVE
Vacuum to open port A 26 mm Hg (1.01 in Hg)
Vacuum to open port B 44 mm Hg (1.73 in Hg)