A stopcock comprising: a housing element defining a central bore and at least first, second and third ports (104, 106, 108); and a handle element which is selectably positionable relative to said housing element, said handle element having a partially peripherally-extending recess; at least one of said housing element and said handle element defining: a first fluid flow passageway communicating between two of said at least first, second and third ports (104, 106, 108); a second fluid flow passageway communicating between at least two of said at least first, second and third ports (104, 106, 108), and a fluid flow guide associated with said second fluid flow passageway, said fluid flow guide extending radially towards an inner facing wall of said central bore, wherein: said recess selectably defines said second fluid flow passageway, with said fluid flow guide partially bifurcating said recess; said fluid flow guide comprises an outward facing edge which sealingly engages said inner facing wall of said central bore, and when said outward facing edge of said fluid flow guide is not located opposite any of said first, second and third ports (104, 106, 108), flow of liquid through said second fluid flow passageway is prevented and flow of liquid through said first fluid flow passageway is allowed; and both said first fluid flow passageway and said second fluid flow passageway are defined by a shaft portion of said handle element; characterized in that said first fluid flow passageway is defined by at least one side-to-side extending bore formed within said shaft portion of said handle element. a housing element defining a central bore and at least first, second and third ports (104, 106, 108); and a handle element which is selectably positionable relative to said housing element, said handle element having a partially peripherally-extending recess; at least one of said housing element and said handle element defining: a first fluid flow passageway communicating between two of said at least first, second and third ports (104, 106, 108); a second fluid flow passageway communicating between at least two of said at least first, second and third ports (104, 106, 108), and a fluid flow guide associated with said second fluid flow passageway, said fluid flow guide extending radially towards an inner facing wall of said central bore, wherein: said recess selectably defines said second fluid flow passageway, with said fluid flow guide partially bifurcating said recess; said fluid flow guide comprises an outward facing edge which sealingly engages said inner facing wall of said central bore, and when said outward facing edge of said fluid flow guide is not located opposite any of said first, second and third ports (104, 106, 108), flow of liquid through said second fluid flow passageway is prevented and flow of liquid through said first fluid flow passageway is allowed; and both said first fluid flow passageway and said second fluid flow passageway are defined by a shaft portion of said handle element; characterized in that said first fluid flow passageway is defined by at least one side-to-side extending bore formed within said shaft portion of said handle element. a first fluid flow passageway communicating between two of said at least first, second and third ports (104, 106, 108); a second fluid flow passageway communicating between at least two of said at least first, second and third ports (104, 106, 108), and a fluid flow guide associated with said second fluid flow passageway, said fluid flow guide extending radially towards an inner facing wall of said central bore, wherein: said recess selectably defines said second fluid flow passageway, with said fluid flow guide partially bifurcating said recess; said fluid flow guide comprises an outward facing edge which sealingly engages said inner facing wall of said central bore, and when said outward facing edge of said fluid flow guide is not located opposite any of said first, second and third ports (104, 106, 108), flow of liquid through said second fluid flow passageway is prevented and flow of liquid through said first fluid flow passageway is allowed; and both said first fluid flow passageway and said second fluid flow passageway are defined by a shaft portion of said handle element; said recess selectably defines said second fluid flow passageway, with said fluid flow guide partially bifurcating said recess; said fluid flow guide comprises an outward facing edge which sealingly engages said inner facing wall of said central bore, and when said outward facing edge of said fluid flow guide is not located opposite any of said first, second and third ports (104, 106, 108), flow of liquid through said second fluid flow passageway is prevented and flow of liquid through said first fluid flow passageway is allowed; and both said first fluid flow passageway and said second fluid flow passageway are defined by a shaft portion of said handle element; characterized in that said first fluid flow passageway is defined by at least one side-to-side extending bore formed within said shaft portion of said handle element.