Ibhodi lokudonsa amanzi lenziwe nge-polystyrene (HIPS) noma i-polyethylene (i-HDPE) njengezinto zokusetshenziswa.Enqubweni yokukhiqiza, ishidi lepulasitiki ligxivizwa ukuze libe isiteji esingenalutho.Ngale ndlela, kwenziwa ibhodi lokudonsa amanzi.
Ibizwa nangokuthi i-concave-convex drainage plate, ipuleti lokuvikela amanzi, ipuleti lokudonsa amanzi ophahleni lwegaraji, ipuleti lokudonsa amanzi, njll. Isetshenziselwa kakhulu ukukhipha kanye nokugcina ungqimba oluvikelayo lukakhonkolo ophahleni lwegaraji.Ukuze uqinisekise ukuthi amanzi angaphezulu ophahleni lwegaraji angakhishwa ngemuva kokugcwalisa emuva.Ingasetshenziselwa nokukhipha amanzi emhubheni.