This is the fourth tip in a series of 10 Tips for a Successful Installation of a conventional, commercial refrigeration system. In this episode, the importance of proper piping practices will be covered. Best practices tips include sizing, use of p-traps, sloping lines, brazing, and vertical pipe risers. Additional information can also be found in the following link: http://www.heatcraftrpd.com/res/pdf/support/Oil_Pressure_Problems.pdf