With the 4009 for 2-4 large comb birds. Consists of PFE20MF, PFB20,( recycled drum supplied by customer, or buy 4010 drum ) 4009 cup. The water in a drum or container must be no higher than 30 cm above the 4007 water cup, these are low pressure devices.
When using this in your chicken coop you should allow the chickens to peck down into this drinker cup to activate the trigger, and drink. That does not mean mounting this or other Chicken drinkers too low. Too low means damage and mess can be made more regularly, Chooks should make some effort with feeders and drinkers. So put this drinker at a height half way between the alert eye height and back or saddle of your smallest chicken. We have found that many people put poultry waterers too low and then tell us of problems of dirty water and clogged systems in their chicken waterer. Poultry have to drink, yet but its easy for you if you make it more difficult for your chooks etc to make a mess of the lovely Bellsouth Chicken drinkers you have bought, installed, and maintain for them.