makes sense the NPT has a taper and the threads tighten as they screw into the tighter tap.... Out of all the nipple style waterrs I like this one the best. Different heights Water catcher for the drips which Always happen... Excellent idea using a water theater drip tray. ONe of my issues with nipples is the leakage. either through use or through defect...
Past poultry: Buff Brhama, EE, Barred rock, Wellsummer,
Bantam mixes, Araucana, Turkeys, & Guinea Fowl.
Future poultry: Guinea Fowl, Sumatra, Wellsummer, Muscovy
"A dream without a plan is just a wish" Katherine Paterson