Siphon Hose 12mm x 1.75M Long Pool, Fuel, Car Boat Truck Siphon HoseFREE POST AUSTRALIA WIDE! 10% off all multi buys at check out! Siphon Hose 12mm X 1. 75M Original Jiggler Top Quality Brand You Can Rely On This self priming siphon hose has a 1. 75M long anti static, anti spark hose with a 1 2" (12mm) diameter copper tip that contains a check valve (glass ball and stainless steel spring). The secret to the siphon hose is in the check valve, which makes it self priming. Just set the copper valve end into your liquid