Do any of you use contracts for customers? Like a monthly service fee for coming out each month to check on their system and make sure its working at peak efficiency. I use contracts for my lawn maintence customers and seeing if I should do the same for sprinklers. For customers that want more than just one time repair work. If you do use them. What aspects do you charge for and are you happy with having them? There is suppose to be a guy around here that just does backflow checks on systems once a year. He does 2 hospitals and 2 or 3 HOA. He works just a month or two and makes enough to take the rest of the year off.