I installed a system for a commercial customer during the summer. This fall, I called about winterizing and they said that they wanted to leave it on during the winter to water the rye grass. Usually we do not have many freezing days in the south but this year has been a different year. Well today they had a customer slip and fall on one of the icy sidewalks and they called me and asked me to turn the system off. I told them I will turn it off and will order a freeze sensor to prevent this from happening in the future. I have no idea how bad the fall was but if the customer was seriously injured and sued the business, is it possible my business could get sued also? I warned the customer about possible freezing weather (I was referring more or less to the pipes, not really the water freezing on sidewalks) but the customer said they would take their chances. My business is fully insured but I prefer not to be sued!!