A bath or basin waste, including: a tube defining a flow passage with an inlet at its upper end and an outlet at its lower end, said tube terminating at its upper end in an outwardly extending flange having an upper face and a lower face and having a bridge extending across said flow passage intermediate said upper and lower ends; a plug assembly mounted in an operative position in said flow passage, said plug assembly including a plug arranged for up and down movement relative to said tube between an open position in which said plug is up and a closed position in which it is down, said plug including an upper face which is substantially flush with the upper face of the flange when in the open position and below the upper face of the flange when in the closed position adjacent its periphery, said plug and said tube defining a space therebetween and said space being the only passage for flow between said inlet and said outlet when said plug is in the open position, said plug assembly further including actuation means mounted in said flow passage and connected to said plug for actuating movement of said plug relative to said tube between the closed position and the open position, characterised in that said plug assembly is engaged with said bridge such that in use it is retained in its operative position in said flow passage only by gravity whereby it can be removed from said flow passage by lifting it from said bridge; and said plug includes guide means arranged to guide said plug in generally linear up and down movement relative to said tube, said guide means including a plurality of circumferentially spaced ribs adapted to engage within the inner face of said tube. a tube defining a flow passage with an inlet at its upper end and an outlet at its lower end, said tube terminating at its upper end in an outwardly extending flange having an upper face and a lower face and having a bridge extending across said flow passage intermediate said upper and lower ends; a plug assembly mounted in an operative position in said flow passage, said plug assembly including a plug arranged for up and down movement relative to said tube between an open position in which said plug is up and a closed position in which it is down, said plug including an upper face which is substantially flush with the upper face of the flange when in the open position and below the upper face of the flange when in the closed position adjacent its periphery, said plug and said tube defining a space therebetween and said space being the only passage for flow between said inlet and said outlet when said plug is in the open position, said plug assembly further including actuation means mounted in said flow passage and connected to said plug for actuating movement of said plug relative to said tube between the closed position and the open position, characterised in that said plug assembly is engaged with said bridge such that in use it is retained in its operative position in said flow passage only by gravity whereby it can be removed from said flow passage by lifting it from said bridge; and said plug includes guide means arranged to guide said plug in generally linear up and down movement relative to said tube, said guide means including a plurality of circumferentially spaced ribs adapted to engage within the inner face of said tube.