Couple of pictures of new backflows installed over the Christmas holidays by the same contractor at one of our high schools. First one is on an area that had been cross-connected to domestic water for years and was finally installed. Second one is on the football field where a new irrigation system was installed last May. It will allow for back-feeding the athletic fields for more water/pressure during the summer months. Both are 3" FEBCOs with Zurn/Wilkens parts also. Why they're different I don't know.