I am building a calving barn and need several pen waterers.  Outside I have always used concrete waterers with the pisser valve to weep water to keep them from freezing.  But I do not want that type inside a barn.

My hired man has used these Tru Test waterers before and likes them.  Are they Agtalk approved?  What other brand of non-freezing waterers do you recommend that do not require electricity or weeping with a drain?  I need them to be double sided so I can split with a panel each waterer to have it serve two pens.

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