Hey all I ordered some nipple waterers from Amazon for my flock and going to use them for my rabbits too. Here they are: http://www.amazon.com/gp/product/B00CF6N9J6/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 Didn't notice before I ordered them that they are 5/16" which is hard to find fittings for. Anyone ever used these and if so where did you get the fittings? Thanks! BTW I have looked at Grainger and other places and they don't have the fittings.