Uma kukhulunywa ngokulawula i-FL OW of media emapayipi amanzi afuywayo nawesitaktri, akukho lutho olushaya i-valve yebhola lethusi. Ngokwakhiwa kwayo okuhlala isikhathi eside, leli valve liyakwazi ukubekezelela ukugqokwa nokudabula okuqhubekayo, okwenza kube yisinqumo esihle salabo abafuna isixazululo esithembekile nehlala isikhathi eside.