good....u are realy doing lots of economical solutions tryouts to dairy farm....and thanks for the discussing same on the forum.
I hope if you select little wider and deeper vessel, it will be best. Because , we have to keep the water level atleast one to one and a half inch low from top of the vessel to avoid any water spillage while dipping cow's mouth. Also, you can consider following few points to try out the same:
1) keep vessel positions slightly slant to the frontside of the manger to allow the spilled water to come out of the manger frontwall instead of get inside to the manger and spoil all feedings,hay n gross.
2) instead of fixing the waste couple at bottom of the vessel try to fix the same at vertical bottomside to avoid all dirt get inside of the water inflow line.
3) If possible provide one removable plug at the centre bottom of the vessel, to clean the vessel offtenly to wash,clean and remove the dirt regularly.
4) For each vessel connecting vessel try to provide a simple water stoppage arrangement i.e. stopper/valve (i think for that size it will not be too costly and cpvc such cheaper item can be used). It serve the two purposes:
i) U can stop the water flowing from the main pipe to that vessel instantly, without affecting the supply of water to other vessels. ii) If u find any concerned vessel place standing animal is fallen sick and tobe avoid the spreading of desease through water, instantly u can stop the same.
Hope above all give a few more better improved ideas. Further, if any you can share the same.
all the best for your efforts.
thanks and regards,