Hansen Foot Valve Hi-Flo 50mm 224836 They also make an excellent

They also make an excellent dog lead

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(Lice usually live along the back of cattle and can actually be controlled by letting the cattle scratch adequately

Scrotal Circumference Tape

Hansen Foot Valve Hi-Flo 50mm 224836 They also make an excellentPrevents flow back & air locking Self cleaning diaphragm Works in any position or angle Smooth operating valve "Hansen HiFlo check valve is used in line to stop fluids reverse flowing in the pipe. The unique Hansen design reduces flow restriction to the minimum. The screw cap allows for easy valve access for service or replacement of diaphragm and spring. (Replacement diaphragm and spring sets are common to both check valves and foot valves of same