Your calves will have no trouble at all working out how to get a drink from this new waste-free water nipple.
Just pipe directly into your calf pens. Ideally use a 45 degree mounting bracket facing downwards and mount at an appropriate height for your calves to drink comfortably (probably about 70cm for young calves).
Ensure the spring-plate is at the top. Biting action of the calf operates the water valve. Water flow is adjustable but nipple is best used in medium to high pressure systems.
All stainless steel bite parts. Brass mounting part. Filter incorporated.
This nipple is self-cleaning with patented flush action after each use. Length 10cm