A quick attach and safe release arrangement for a pump of the type in which a pump chamber has at least one chimney and at least one separable port locatable in the at least one chimney. The quick attach and safe release arrangement is provided with a cooperating retaining elements integrally formed with the at least one chimney and integrally formed with the at least one separable port respectively, for retaining the at least one separable port in within the at least one chimney. The at least one separable port and the at least one chimney are rotatable relative to one another and the cooperating retaining elements have a single port release position at a predetermined angular position of the at least one separable port relative to the at least one chimney.