Once, HDPE was regarded as an inappropriate material for use of firefighting water system as 1.6 Mpa of the normal pressure is lower than 2.5 Mpa that steel has. 

 However, KUPP's high-pressure HDPE pipe reinforced by Highly Stiff Materials withstands the normal pressure up to 6.5 Mpa. Certainly , the alternative solution to replace a highly corrosive steel pipe is our HDPE pipe for firefighting water works.