(57) An integral flow directing and filter unit formed from a unitary body (1) integrally
formed by moulding plastics material, having two axially aligned rotor housings (28,
29) of centrifugal pump impellers formed therein which are open at their outer axial
ends, a suction chamber (27) positioned between the housings and in communication
with them, two delivery outlets (11, 12) in communication with the said housings,
a filter housing (21) in communication with the suction chamber and an inlet (15)
in communication with the filter housing (21).
The structure is completed by a filter (2) lodged in the filter housing (21) and by
two independent motor units (4, 5) with an associated impeller (6) coupled with the
unitary body (1), each closing the open axial end of the rotor housing (28, 29) in
such a way that the flow is directed into one or other of the outlets by activating
one or other of the two motors.
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