All six sizes of the NPT threaded S250 series, from 1/2” to 2”, have been certified lead-free to NSF/ANSI 61 by the methods prescribed in NSF/ANSI 372.
Easyflex’s Ultra Performance Flexible Sprinkler Drop features a 1 1/4” ID, which translates into less friction loss than 1” Schedule 40 Pipe with the same number of 90°s, the company notes.