Kugenzura Umuringaikozwe mu muringa wahimbwe, nanone yitwa non-return valve, yagenewe kugenzura imigendekere yimikorere ya sisitemu yo kugenzura amazi, ayo mazi ayobowe na disiki yimuka kandi itemba mu cyerekezo kimwe, ikoreshwa cyane mu kuvoma, kuvoma, no mu miyoboro.