The elbow fitting retains the line's flow properties when cornering. The presence of a knee on a turn eliminates the problem of narrowing the branch and the formation of a gap, which pipe benders often sin. Moreover, the L16x16 allows you to make the pipeline collapsible, which will greatly simplify the process of updating and cleaning the system.

In the Internet catalogs Waterpro presents a range of elbow pipe fitting, there are internal and external models from 16x1/2" to 26x1".