An apparatus for rotating a bed-ridden person in order to prevent pressure sores, or bed sores, comprising an first set of bladders and a second set of bladders, and at least one fluid pump, which may be an air pump, in fluid communication with the bladders through a system of fluid valves. Inflating first set of bladders will cause a patient to be rotated onto their right side； likewise, inflating the second set of bladders will cause a patient to be rotated onto their left side. A patient may therefore be rotated from left side to right side in order to prevent pressure, or bed, sores from occurring. The invention may be programmed to rotate persons automatically on any predetermined timing, and in any sequence, desired, or by manual command. The invention also comprises a pump and valve assembly for low pressure applications.
