Evoqua Acid And Bicarb Ball Valves Failing

The ball valve in question was in both the old style MarCor wall boxes and the new style. I literally am replacing ball valves weekly. Being pro active and during a vinegar disinfect I found several valves so hard to turn that I took it upon myself to replace anyone that was sticky. Within a month I had 2 bicarb valves a week breaking and usually one acid valve. I’ve reached out to Evoqua on the subject and they state it’s the first they have heard of this issue. I, as a biomed cover clinics in Oregon, Washington and occasionally Alaska and have had bad valves in all states. I have had nothing but issues. The old style we had breakage too but not on this level. I have requested full replacement of every box at our clinics effected. That is how bad this issue is.