Pressure, Vacuum and Temperature Specifications

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

TWO-WAY CHECK VALVE
Vacuum To Open Port A (Fuel Tank Pressure) 1.46 in Hg (37 mmHg)
Vacuum To Open Port B (Barometric Pressure) 1.73 in Hg (44 mmHg)