siphonic rainwater drainage system

ZH-systems rain strainer is one of our own research products. It is made of **4 strainless steel which resistants corrsion and extrusion. The long-term results of using rain strainer shows that it has the function of resisting vortexing, it also keeps the gas out of the rain strainer, in order to folw the water into the pipe. Zihui HDPE drainage systems fitting complied with all of national and international standards(EN ***9). And because all of the fittings are made from the same New HDPE Material, the connection quality and consistence of the system can be assured.