What compact float (or other sort of level sensitive) valves will cope OK with mains water pressure of around 5 bar? It also needs to be able to cope with being outdoors and, probably, freezing occasionally.
This is to set up a chicken (and possibly dog) waterer. We already have some horse waterers which just have 'ordinary' long arm with a ball on the end float valves and they seem to cope pretty well with being outdoors but I want something to put in a much smaller container of some sort.