Abstract: Water tightness means for bath tubs or shower trays having a peripheral edge with an essentially rectangular upper groove near the edge, wherein on top of this bath tub or shower tray is placed a strip configured such that it has a vertical face meant to rest on the wall, with at least one lip in cross section, the bottom face having a thin tab in cross section meant to enter the upper peripheral groove of the bath tub or shower tray, resulting in a play that allows adjusting the distance from the bath tub or shower tray to the wall.

Abstract: It is formed by a piece installed on the floor, constituted by a plate (1,101), whose top side is set at the same level as the floor (9) on which the plate is installed; along at least part of the perimeter of the plate, there is a header (4,102) which is open at the top and which does not rise higher than the top side of the plate; the bottom of the header is situated at a lower level than that of said top side of the plate; the header leads into a drainage orifice (7,104) also situated at a lower level with respect to that of said top side; it is characterized in that the header (4,102) presents a top opening (5,103) for the intake of water from the shower base, said opening being narrower than the header as such.It facilitates the access of elderly and disabled people and of people on wheelchairs, and at the same time it can be efficiently cleaned.