I need to replace a automatic water-fountion. It will be on high pressure rural water, meaning it needs to have a non-syphon shut-off. A 100% energy free waterer would be good, but we do have access to electricity if needed for supplement heat. It runs up to 70 head of cattle at any givin time. I am located in northern Missouri. Currently the location of the waterer does not have a riser around the water pipe, is there a waterer that will work well enough that we do not have to tear up the concrete around the pipe to install a riser? If a riser is needed, how big in diameter should it be? and how deep? thanks for any suggestions, David