How many of you guys are service only companies, I mean you don't own installation equipment and the majority of your work is service repairs and winterization/back-flow testing? Also, do you stay very busy? This is something that I am thinking of doing part-time. I work every three days and have plenty of time to service systems and do the blow outs and back-flow testing in the spring/fall. Plus it keeps me from have alot of overhead in equipment.