In the preferred embodiment, the center portion 46 is spaced closer to {TAIL ~ the open top} end 44A of the body 44 such as to allow the open bottom end 44B of {HEAD ~ the body} 44 to be securely mounted on the vent pipe 40 
In the preferred embodiment , the center portion 46 is spaced closer to { TAIL ~ the open top } end 44A of the body 44 such as to allow the open bottom end 44B of { HEAD ~ the body } 44 to be securely mounted on the vent pipe 40
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH