A pump assembly (200) for therapeutic inflatable cell apparatus, the assembly comprising a common pump unit (210), control means (160), and, first and second valve means (201;202), each valve means comprising a cycle control valve means, said cycle control valve means being provided with at least one fluid passageway and each valve means being adapted to be positioned to predetermined conditions so as to regulate fluid quantity in respective therapeutic inflatable cell apparatus, each valve means is adapted to perform at least one respective inflation/deflation sequence, and the assembly being such that, in use, on air being required by a valve means at a particular instance during the respective inflation/deflation sequence, the control means activates the common pump unit and air is pumped to an air outlet to feed air to the at least two valve means, and the pump assembly being such that the first and second valve means are operable both singularly and simultaneously.