Abstract: To reduce the barrier sealant amount, the area of a throat (88), communicating an inlet compartment (78) to an outlet opening (64), is made small. Should sealant not be in the throat, wastewater in the throat would be correspondingly small. A snorkel (110) in a discharge section drain tube (98) extends downwards to above the level of the horizontal drain, and allows any air from the external drain to pass to the outlet compartment generally below the ceiling (90) so that, should wastewater cover the opening of the drain tube, such air is permitted to enter into the cartridge and to prevent any syphoning. A three rib channel guide mechanism (100) within the tube guides wastewater flow towards the drain tube center, and away from the drain tube walls to avoid deposit of any sediment contained in the wastewater.

Abstract: The amount of sealant needed as an odor barrier in a wastewater cartridge is reduced. The cartridge inlet compartment (78) has a ceiling (90) of given area. The ceiling is spaced from the cartridge upper wall (60) and from the wastewater-receiving opening (64) therein. A throat (88), which communicates the inlet compartment with the wastewater-receiving opening, has an area which is less than the area of the ceiling, so that the amount of the sealant acting as the barrier, as contained within the throat, is less than any further amount of the sealant (under the ceiling) which floats on the wastewater in the inlet compartment. Also, should sealant not be present within the throat to act as an odor barrier, only a small area of wastewater present within the throat would be exposed to the air external to the cartridge and, thus, present a lesser opportunity of odor to emanate to the outside environment.

Abstract: A cartridge for placement in a urinal includes a chamber having an entry for receiving wastewater (e.g., urine), a quantity of sealant floatable on the wastewater in the chamber for functioning as a barrier to odors that may otherwise emanate from the wastewater in the chamber, a sealant reservoir coupled to the chamber for containing a supply of the sealant, and a closed path sealant dispenser for dispensing the sealant from the sealant reservoir to the chamber for maintaining the sealant modicum atop the wastewater. The sealant dispenser includes a cap having a U-shaped channel, and opening, and an orifice entering into a throat in which the sealant floats. An air vent avoids the buildup of suction in the primary reservoir.

Abstract: An elastomeric anti-flushing diaphragm (80) having a cantilevered peripheral rim (84) is supported by and resides under a diverter (52) which is placed directly over the main or primary drain opening (44) in a top wall (40) of a urinal cartridge (22). As liquid passes under the diverter, a negative pressure or suction is created on the underside (96) of the diaphragm. As the flow of liquid increases, the negative pressure increases to pull down the peripheral edge (rim 84) of the diaphragm on the top wall and to constrict the flow of liquid that can pass under it, thus limiting the amount of turbulence in the sealing fluid (30) within the cartridge and preventing its loss to an external drain tube (34). When the liquid flow is sufficient to rise above the diverter, as in the case of a bucket (100) of water (102) being poured into the urinal bowl, the water creates a positive pressure above the diaphragm, that is, on its upper side (94).