I thought we already did a thread on this topic but I couldn't find it so started this one.... Have bunch of properties with hard water (20-30 grains of hardness). The stuff will clog up a copper water pipe if not soften. Anyways, with valves and the tiny holes in the diaphragms and ports and filter screens, is there any that work better than others? Is this not really an issue with irrigation? In the northern states here, Indiana and Michigan; run the irrigation May-September. Looking for 1 1/2" valves that's not going to set me back $100 per.