to locate the locating pads 162 against a lower surface of the rim 168 the locating pads 162 will pivot such that they locate securely against the lower surface at the same time the rod 162 acts as a strut to urge the pressure body 166 against the meal plate 154 of the sealing body 150 thereby urging the sealing body 150 downwardly into the waste outlet of the toilet bowl the pressure thereby applied forms a seal between the peripheral surface of the sealing body 150 and the material of the toilet bowl to enhance protection against floodwater gaining entry to a building through a toilet installation the invention provides apparatus for protecting the overflow that is commonly provided as part of the installation of a toilet cistern a typical arrangement of such an overflow is shown in fig1 amp 14 the overflow includes a pipe 170 normally of plastic material that extends from the toilet cistern through an external wall 172 of a building to open at the building 39 s exterior this allows water to run away harmlessly in the event that the cistern is overfilled the external outlet of the pipe 170 draws attention of a building owner to the leaking water note that a similar overflow can be associated with other cisterns such a feed tank for a hot water cylinder and this invention can be applied to such an overflow it is however uncommon for these to be situated at a height that floodwater is likely to reach the apparatus of this embodiment includes a spigot component 174 and a cap 176 each being moulded of plastic material the spigot component 174 is tubular and has an internal diameter that is a close sliding fit onto the overflow pipe 170.