Lesi sitezi esiqedwe ngaphambilini esingangenwa amanzi sifika nezinto eziminyanisa kakhulu ezinikeza ukuvikeleka kwamanzi okugcwele kusukela phezulu kuya ku-subfloor. Ingakwazi ngempela ukunqanda ipulangwe emanzini kanye nomswakama nge-TSR ephansi(Izinga Lokuvuvukala Kokuqina) .Isitezi esikahle kakhulu — esingangeni manzi, sihlala isikhathi eside futhi ngaphandle kokucindezeleka.