A pump system can include a tube disposed about a rotor. The rotor can be configured to drive fluid through the tube as the rotor rotates. The tube can be replaceable when the tube fails. The pump system can include a processor configured to determine a predicted number of revolutions of the rotor before the tube fails based on a number n of past tube failure detection (TFD) events. Each past TFD event can have a corresponding n.sup.th TFD value based at least in part on the number of revolutions the rotor had rotated before the tube failed. When n=0, the predicted number of revolutions can be set to a putative value, and when n=1, the predicted number of revolutions can be based at least in part on the first TFD value and the putative value.

The present invention provides a water-pumping device and a hairdressing device. The water-pumping device is connected to a liquid storage device to deliver liquid in the liquid storage device, and includes a chamber for containing the liquid and a squeezing device. Two ends of the chamber are communicated with a first water delivery channel and a second water delivery channel respectively, the first water delivery channel is connected to the liquid storage device, and a wall surface of the chamber is at least partially made of a deformable material, and the squeezing device periodically squeezes the deformable material from one end of the chamber to the other end thereof to cause the first water delivery channel to pump water and the second water delivery channel to deliver water. No hose is provided in the chamber so that the number of components is reduced and the overall structure is simplified.

A peristaltic pump includes a housing and a rotor that rotates about a rotor axis. The rotor has a rotor body and a pump. The housing has a cut-out in which the rotor is accommodated and a support surface extending about the rotor axis. The support surface supports a tube segment that is introducible between the rotor and support surface. The rotor has a first element for manually actuating the rotor and a first portion for applying a manual rotation actuation force. The first element is mounted on the rotor body and is movable relative to the rotor body between a first position, in which the first portion is spaced from the rotor axis by a first length, and a second position, in which the first portion is spaced from the rotor axis by a second length, the second length being greater than the first length.

An apparatus for facilitating control of fluid or slurry movement in a collapsible tube is provided. The apparatus includes the tube. The tube includes first and second opposing wall portions having circumferentially varying thickness including first and second maximum thicknesses respectively, the first and second maximum 5 thicknesses disposed on opposite sides of the tube, and third and fourth opposing wall portions between the first and second opposing wall portions, the third and fourth opposing wall portions having third and fourth circumferentially minimum thicknesses respectively, the third and fourth minimum thicknesses disposed on opposite sides of the tube about halfway between the first and second maximum thicknesses. 10 wherein the first and second opposing wall portions are configured to be engaged by a tube engager to cause the tube to fold at the third and fourth minimum thicknesses to seal the tube. Other apparatuses, systems, and methods are disclosed.