within the cap 106 through the drain ports 218 and 220 and due to the angled tangential inlet flow is entrapped and removed in the main flow stream as shown in fig1 a and 1b the remaining fluid typically gas leaves the chamber 206 through the outlet 214 and passes into the fluid line 216 the fluid line 216 is shaped so as to form a gas weir 217 denser fluid leaves the separator downstream of the core region by passing through the ports 213 in the heavier fluid outlet conduit 205 and flows in a downstream direction within the conduit 205 through the slurry cage and into the fluid line 224 via the fluid outlet 222 in the slurry container 118 a further embodiment of the present invention is shown in fig5 the system of fig5 comprises a cap a separator and a slurry cage substantially as described hereinbefore and as shown in fig3 and operates in the same general manner as the system shown in fig3 accordingly components common to the systems of both fig3 and 5 are indicated using the same reference numerals however the arrangement shown in fig5 employs a further alternative fluid collection regime the components.