a valve housing defining {HEAD ~ an enclosed hollow space} which is substantially circular in {TAIL ~ cross section}, said valve housing including said vertical refill pipe, a transverse inlet pipe receiving water from said supply pipe and a transverse supply line disposed opposite to said inlet pipe at a level higher than said inlet pipe, said supply line being connected to and supplying water to said rim flushing conduit of said toilet bowl; said refill pipe, said inlet pipe and said supply line being communicated with said hollow space 
is substantially circular in
a valve housing defining { HEAD ~ an enclosed hollow space } which is substantially circular in { TAIL ~ cross section } , said valve housing including said vertical refill pipe , a transverse inlet pipe receiving water from said supply pipe and a transverse supply line disposed opposite to said inlet pipe at a level higher than said inlet pipe , said supply line being connected to and supplying water to said rim flushing conduit of said toilet bowl ; said refill pipe , said inlet pipe and said supply line being communicated with said hollow space
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