A membrane unit includes: a cross-flow membrane filter; a cylindrical casing housing the membrane filter; a cap provided with an inflow port that allows water to flow into the casing, a first discharge port that discharges, to outside of the casing, permeated water obtained as a result of water that flows into the casing from the inflow port permeating the membrane filter, and a second discharge port that discharges, to the outside of the casing, concentrated water obtained as a result of water being concentrated as a result of the permeated water permeating the membrane filter, the cap detachably occluding the casing; and a positioning member which is fixed to the cap taking the first discharge port as a reference, and which defines a position of the membrane filter inside the casing.

A wash-basin includes a wash bowl portion and an outer lateral portion that is connected to an outer peripheral portion of the wash bowl portion and has a lower end portion mounted on the supporting member. A step portion having a shape, in which a mounting portion side is recessed toward an outer lateral surface side of the wash bowl portion from an outer peripheral surface, is formed at a connection portion between the outer peripheral surface of the outer lateral portion and a peripheral edge of the mounting portion, which is mounted on the supporting member, of outer lateral portion. The step portion has a size that allows caulking work between the supporting member and the step portion.

A wash basin includes a wash bowl portion and an outer lateral portion that is connected to an outer peripheral portion of the wash bowl portion and has a lower end portion mounted on the supporting member. On a lower surface side of the wash bowl portion, each of recessed grooves is formed in a connecting portion between an outer peripheral surface of the outer lateral portion and the wash bowl portion.

A wash basin (2) includes a bowl unit (4) and a skirt (6) that supports the bowl unit. The bowl unit (2) is made mainly or entirely of metal and the skirt (6) is made mainly or entirely of a moulded thermoplastic material. The skirt (6) includes a peripheral rim (28) that is located beneath an edge portion (29) of the bowl unit to support that bowl unit, and the bowl unit (4) and the skirt (6) are bonded together.

A wash basin (2) includes a bowl unit (4) and a skirt (6) that supports the bowl unit. The bowl unit (2) is made mainly or entirely of metal and the skirt (6) is made mainly or entirely of a moulded thermoplastic material. The skirt (6) includes a peripheral rim (28) that is located beneath an edge portion (29) of the bowl unit to support that bowl unit, and the bowl unit (4) and the skirt (6) are bonded together.

A method of making a sanitary basin. The method has the steps of providing a steel basin body, coating a face of the body with a layer of enamel, and burning macroscopic structures into the enamel coating with a laser beam. The structures are interconnected, for example forming a channel network.

A method of making a sanitary basin. The method has the steps of providing a steel basin body, coating a face of the body with a layer of enamel, and burning macroscopic structures into the enamel coating with a laser beam. The structures are interconnected, for example forming a channel network.

A portable washbasin step having a step-structure including a support system that is configured to be in physical communication with a substantially horizontal surface. A washbasin that is useful for cleaning feet is separable from the step-structure. The washbasin may have an opening a first-distance from the substantially horizontal surface. A planar surface is configured to be parallel to, and a second-distance from the substantially horizontal surface. The second-distance may be greater than first-distance. The portable washbasin step may be used by a user to wash in the washbasin and subsequently climb onto the planar surface.

A portable washbasin step having a step-structure including a support system that is configured to be in physical communication with a substantially horizontal surface. A washbasin that is useful for cleaning feet is separable from the step-structure. The washbasin may have an opening a first-distance from the substantially horizontal surface. A planar surface is configured to be parallel to, and a second-distance from the substantially horizontal surface. The second-distance may be greater than first-distance. The portable washbasin step may be used by a user to wash in the washbasin and subsequently climb onto the planar surface.