otherwise similar referring to fig1 a pump according to the invention is shown that is similar in most respects to the pump described with reference to fig1 8 with features denoted by like reference numerals however the housing 203 has four fluid outlets 205 a 205 b 205 c 205 d the fluid outlets 205 a 205 b 205 c 205 d are connected to four connectors 206 a 206 b 206 c 206 d that meet at a combiner 207 the function and operation of the remaining components are otherwise similar referring to fig1 a pump as described with reference to fig9 is shown however the fluid conduit 2 comprises a nozzle body 10 to which is connected an agitator nozzle 9 the nozzle body 10 provides a fluid connection between the fluid conduit 2 and the nozzle 9 via a flexible connector 12 the flexible connector 12 may be made from for example an elastomeric material the flexible connector 12 allows the angular orientation of the nozzle 9 to be adjusted relative to the longitudinal axis 11 a nozzle orientation means 13 is provided for effecting this adjustment in orientation in the embodiment shown the orientation means 13 comprises a pair.