Abstract: A washing brush contains a brush body with a central opening, that engages a cylindrical projection, which is positioned in the vicinity of the edge of a cover. The cover is in one piece with a gripping member, which can be connected to a water-carrying member.In the center of the cover and the brush body is provided an annular locking member, which passes through the cover within the liquid-carrying area in the form of a push button. By depressing the push button, it is possible to release the angular locking member between the gripping member and the brush body.

Abstract: An admixer for delivering soluble additives to flowing liquids containing a valve with a rotary valve body and a container for receiving the additive in tablet form located in the extension of the valve body. The valve body contains an outer channel guide which can be made to coincide with the valve inlet port and a tubular water guide leading through the interior of the valve body.

Abstract: A joint for a water-carrying pipe system, e.g. for a garden spray, has a joint shoulder with a disk-like part for each pipe end to be connected. The two disk parts are arranged on either side of the hose passed centrally through the joint. On either side of the joint, the hose is connected to the pipe ends in that it is passed through an opening, whose internal diameter is somewhat smaller than the external diameter of the hose. Thus, the hose engages flat on the openings of the pipe ends, so that this in itself leads to a liquid-tight seal.

Abstract: A device for adding a solid additive to a liquid has a liquid inlet, a liquid outlet and a receiving container for the solid additive in the form of a tablet or bar. The tablet or bar is hollow, being shaped like a cylindrical ring. The liquid is moved axially past the inner surface and outer surface of the cylindrical ring, and during wearing away of additive material, there is a reduction in the size of the outer surface and a corresponding increase in the size of the inner surface. Therefore, the overall surface area remains constant, which leads to constant admixing. Preferably, an inner tube spaced from the inner surfaces of the additive discharges liquid for flow across the inner and outer surfaces in the same direction.