In the second mounting position, {HEAD ~ the concave interior} of the trough provides {TAIL ~ the pooling space}, and an outlet of the reservoir is in pool feeding communication therewith, to permit at least partial emptying of the contents of the reservoir into the trough, when a contents emptying force is applied 
In the second mounting position , { HEAD ~ the concave interior } of the trough provides { TAIL ~ the pooling space } , and an outlet of the reservoir is in pool feeding communication therewith , to permit at least partial emptying of the contents of the reservoir into the trough , when a contents emptying force is applied
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH