Bell & Gossett, a Xylem brand, announces the availability of Version 4 of its popular Bell & Gossett System Syzer program for PC computers. Version 4 is an update of the tool for calculating flow rates and pressure drops in HVAC piping systems. The program provides a more comprehensive, user-friendly and Web-based selection tool for engineers, consultants and designers. Among the many new features are: a Spanish language option; support for PVC pipe; more fluid property information; lock icons to indicate what variable is to be solved; ASHRAE 90.1 pipe-sizing standards; estimated pump energy cost based on pipe size; and help calculating system head loss. System Syzer applications are free of charge and can be downloaded