20 u00b0 apparatus 20 further has a unique sloped outlet leg portion 40 extending from a first end 41 at an outlet connector member 33 the outlet connector member 33 is similar to the inlet connector member 30 and has a thread coupling 35 for attachment to a complementary coupling on the outlet drain line not shown the outlet connector member 33 has a generally vertical orientation when attached to the outlet drain line and a longitudinal vertical axis l 5 extends through the central tubular section of the outlet connector member 33 as with the inlet connector member 30 the outlet connector member 33 allows for plumbing alignment and for insertion of the outlet drain line into the connector member 33 for proper pipefitting outlet leg portion 40 is tubular with a circular or oval cross section a longitudinal axis l 6 extends through the central part of the outlet leg portion at an inclined or sloped angle b again there is improvement even when angle b is low greater than about 5 u00b0 significant improvement may be achieved with angle b in the range of from approximately 15 u00b0 to a range of approximately 35 u00b0 from the vertical longitudinal axis l 5 of the outlet connector member 33 maximum efficiency may be achieved when angle b is approximately 20 u00b0 this simple but unique angular configuration and arrangement of the inlet and outlet leg portions of the apparatus 20 provides for enhanced flow dynamics within the housing and especially the bight thereby reducing buildups in the flow path of the device turning to fig3 and 7 one embodiment of.