I have been working on a golf course that pumps from a pond. The valves that were used in the original install were 1" residential Buckner valves. I have replaced the top end and diaphragm in many of these. Until this point I have not worked on many systems that use dirty water. A few residential but they do not see the abuse a golf course system would. After checking I see valves designed for dirty water and higher pressures cost about 6-7 times more. At this point it would not be practical to replace all the valves. Needless to say but it would be safe to assume there would be less valve issues if the correct type valve would have been used. Not really a question here just sort of a vent and would like to hear from those who work with a lot of dirty water.