1. The system is with a separator, which can effectively separate the water vapor, and reduce the amount of water vapor in the vacuum pump;
2. discharging tube adopts 100 mm PVC reinforced pipe, which perform better at compression, wear, service life, and aging;
3. The tank with non-overflow valve can prevent overflowing caused by excessive suction; the use of combined pressure and vacuum gauge and vacuum gauge, can be convenient to observe the suction, internal pressure during discharging.