Kaviri wall corrugated pipe (DWC pombi) imhando nyowani yepombi ine high-density polyethylene seyakagadzirwa. Iyo ine hunhu hwehuremu huremu, kukwirira kudzvinyirira kuramba, kusimba kwakanaka, kuvaka nekukurumidza uye hupenyu hurefu hwebasa. Yayo yakanakisa pombi madziro dhizaini inoderedza zvakanyanya mutengo uchienzaniswa nemapombi ezvimwe zvimiro. Uye nekuti kubatana kuri nyore uye kwakavimbika, kwave kushandiswa zvakanyanya kumba nekune dzimwe nyika. Tsiva nhamba huru yemapombi ekongiri uye pombi dzakakandwa dzesimbi.