Mgbe ị na-arụ ọrụ, tinye waya drain n'ime mkpọchi waya dị n'akụkụ ala nke isi ọrụ nke mkpanaka drain tupu oge eruo, sie ike skru ahụ iji kpọchie waya ahụ, wee kwụnye nrụnye ahụ na waya bụ isi, wee dọpụta mkpanaka drain ahụ ala, akụkụ ala nke isi ọrụ nke ogwe nrụnye ahụ ga-aga n'ahịrị bụ isi, wee kụgharịa ogwe nrụnye ahụ n'akụkụ elekere, elu nke mkpọchi drain ga-akpọchi ahịrị bụ isi. Mgbe etinyere mkpọchi ahụ na-ejikọ isi ndu na ahịrị drain, enwere ike iji onye na-arụ ọrụ egbe ahụ tọhapụ ahịrị drain site na ịgbagọ mgbanaka mkpọchi nke ahịrị drain mkpọchi na mkpanaka drain. Mgbe ahụ tụgharịa mkpanaka drain ahụ n'akụkụ aka ekpe, tọhapụ usoro mkpọchi nke mkpanaka drain na waya isi ndu, ma pịa mkpanaka drain ahụ elu. Mkpọchi waya dị n'akụkụ ala nke isi ọrụ nke mkpanaka drain ahụ ga-agbada, tọhapụ njide na waya isi ndu, ma wepụ mkpanaka drain ahụ, arụchaala ọrụ njikọ waya dị ndụ.