... 8.Can use a variety of trenchless ways, great convenient for construction and installation. 9.Low system cost, less maintenance costs ... diameter PE pipe, health non-toxic, not fouling, more suitable for urban water supply main conduit and buried tube, safety, hygiene ... , cross road construction, good impact resistance, it is the ideal tool for agricultural irrigation. PNPN 1.6MPa SDR 11PN1.25MPa SDR 13 ...