Portable hand fuel pump: built- in outlet and inlet to backflow, extraction directly. the indicates flowing direction.. Hand oil sucker pump: this siphon pump for gasoline not for use on salt water or copper chemicals.. Hand oil pump: use the hand fuel pump, it would start siphon flow soon. built in one way to prevent backflow. the arrow on rubber bulb indicates flow direction.. Oil absorber pump: the siphon pump works when the aim container is lower than the source container.. Pipe oil absorber pump: easy carry and stored, a very helpful emergency or life assistant for gasoline, petrol, oil, fish tank water transfer. not for hazard chemical fluid..
