Hansen Check Valve Hi-Flo 50mm 212951 just unscrew the silver fitting

just unscrew the silver fitting at the end (and put in a safe place if you need it later for luer lock attachments as these are not sold separately)

Each lever has a nut fitted to the end

When you have a weak premature-born calf needing careful feeding switch to Stop or Slow and let it take milk as it can cope without drowning

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Hansen Check Valve Hi-Flo 50mm 212951 just unscrew the silver fittingPrevents fluid reverse flow Fast open close response Smooth valve opening at just 1 PSI "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 dimension.) BSPT thread.