Urinal screens are provided including an outer ring and a web portion bounded by the outer ring and formed from a plurality of web strings disposed in a mesh pattern, such that a plurality of open areas are defined among the web strings. The web portion includes a vaulted portion. Urinal screen assemblies are also provided and include a urinal screen and a bioenzymatic block containing odor combatting chemistry disposed in a void formed by the vaulted portion of the urinal screen.

A device is claimed for passively diffusing sanitizing, deodorizing and tablets of other materials in a container of water. Preferably the invention is applied to diffusing sanitizing tablets, deodorizing tablets and tablets of other materials in a toilet tank, and means are described for positioning the device and controlling the amount of sanitizer and deodorizing and other materials diffused per flush.

In some embodiments, a water straining and chemical additive device may include a filter body having a wall inflow surface, a central aperture, and a peripheral aperture. A return water tube having a tube outflow surface and a tube inflow surface may be coupled to the filter body. An inflow conduit may be in fluid communication with the peripheral aperture, and the inflow conduit may be formed by the wall inflow surface and the tube inflow surface. An inflow filter screen may be coupled to the peripheral aperture. A filter cap forming a primary cavity in fluid communication with the central aperture and the peripheral aperture may be coupled to the filter body. An outflow filter screen may be coupled to the central aperture. An outflow conduit may be in fluid communication with the central aperture, and the outflow conduit may be formed by the tube outflow surface.

A toilet that includes a tank configured to hold water from a water supply; a reservoir fluidly connected to the tank and configured to hold a cleaning compound comprising a chemical compound and water from the water supply; and an actuator configured to control a flush cycle of the toilet upon a first activation, the actuator including at least one nozzle fluidly connected to the reservoir and configured to discharge an amount of the cleaning compound external to the tank upon at least one of the first activation or a second activation.

A stacked type quantitative toilet cleaning agent dispenser includes a housing, an inner box mounted in the housing and defining the housing a bottom chamber beneath the inner box and an aisle around the inner box and above the bottom chamber, and a cover covering the inner box and having a first water inlet in communication with the inside space of the inner box and a second water inlet. Further, the inner box has an open end tube that keeps the second water inlet in communication with the bottom chamber and isolated from the inner box. Further, the cover has a first water outlet below the elevation of the first water inlet. The aisle is disposed in communication with the space outside the housing via a second water outlet that is disposed below the elevation of the second water inlet.

A toilet rim block which consists of an outer cover and a core, and to a rim block cage including the toilet rim block. The outer cover includes a first composition and the core includes a second composition. Preferably, the first and the second compositions differ from each other by at least one of the following features: different active substances, different concentration but same active substance, and different viscosity. The outer cover partly encloses the core, and the core protrudes on at least two faces of the toilet rim block right to the surface as a pole and is exposed. The toilet rim block is spherical and the second pole protrudes to the surface on the face of the toilet rim block opposite the first pole, and is exposed.

A toilet rim block which consists of an outer cover and a core, and to a rim block cage including the toilet rim block. The outer cover includes a first composition and the core includes a second composition. Preferably, the first and the second compositions differ from each other by at least one of the following features: different active substances, different concentration but same active substance, and different viscosity. The outer cover partly encloses the core and the core protrudes on at least one face of the toilet rim block right to the surface as a pole and is exposed. The core is shaped such that the surface of the exposed area changes upon even wear of the surface of the toilet rim block, the surface of the exposed area of the core reducing upon even wear of the surface of the toilet rim block.

A toilet rim block which consists of an outer cover and a core, and to a rim block cage including the toilet rim block. The outer cover includes a first composition and the core includes a second composition. Preferably, the first and the second compositions differ from each other by at least one of the following features: different active substances, different concentration but same active substance, and different viscosity. The outer cover partly encloses the core and the core protrudes on at least one face of the toilet rim block right to the surface as a pole and is exposed. The core is shaped such that the surface of the exposed area changes upon even wear of the surface of the toilet rim block, the surface of the exposed area of the core increasing upon even wear of the surface of the toilet rim block.

A device for a toilet bowl, including a mechanism for holding the toilet rim block to the toilet bowl. The invention further relates to at least one, preferably at least two toilet rim blocks, each having an outer cover and a core, and to a rim block cage including the toilet rim block. The outer cover includes a first composition and the core includes a second composition. Preferably, the first and the second compositions differ from each other by at least one of the following features: different active substances, different concentration but same active substance, and different viscosity. The outer cover partly encloses the core and the core protrudes on at least one face of the toilet rim block right to the surface as a pole and is exposed.

The present invention provides a chlorine retention reservoir for a toilet. The chlorine retention reservoir comprises a housing having a base and a sidewall forming an interior volume with an open upper end. The open upper end includes a lip extending perpendicularly from the sidewall disposed around a perimeter thereof, wherein the lip receives a channel of a lid. The housing further includes an input port and an output port that receive a liquid therethrough. A plurality of baffles are disposed within the interior volume of the housing. A slot is disposed on an exterior surface of the housing, wherein the slot receives a fastener. The fastener removably secures the housing to an interior surface of a tank of a toilet. A chlorine tablet is placed within the housing where it is subjected to incoming water from a flush creating a chlorine solution that is discharged to a toilet bowl.