The biggest secret in spray equipment is "check your filter". There is nothing you can do with your spray equipment that will save you more money than this simple activity. We repair and replace more pest control spray equipment (and weed control spray equipment) because of clogged filters than for any other reason. We tell the boss that if his techs would have checked the filter, the repair and downtime could have been avoided. It doesn't seem to do any good. The next month they are back for the same reason.
Check, and clean, your spray equipment filter. Its money in the bank.