Abstract: A flow regulator assembly for controlling fluid flow in flexible tubes which can be attached at a point intermediate the ends of the tube and which has a regulating member rotatable to a selected position to move into engagement and deflect the tube to decrease fluid passage therein in proportion to the amount of rotation of the regulating member. Means are provided to resist rotation of the regulating member from its selected position and provision is made for an indicator which makes it possible to select the rate of flow visually or through a sense of feel. One embodiment provides for selection of the rate of flow by listening to sounds made during rotation of the regulating member.