The present disclosure discloses a magnetic floor drain, comprising a floor drain body and a sealing cover. A straight-through water outlet is provided at a lower part of the floor drain body. A locating surface is provided at one side of the water outlet. At least one fixed magnetic block is provided on the locating surface and all the fixed magnetic blocks are provided in an interval arrangement. One side of the sealing cover is connected flexibly to the locating surface through a hinge structure. At the same time, a movable magnetic block is provided at the hinged side of the sealing cover. Centers of the fixed magnetic block and the movable magnetic block are both located on the axis of the hinge structure. The present disclosure provides an adjustable draining which is simple and useful, convenient to assemble and few accessories needed.

A backflow prevention apparatus is provided with a check valve and a float-type backflow prevention valve, these being installed in this order as one proceeds from upstream to downstream. The check valve comprises a valve seat; a valve member that closes the valve at the valve seat due to an upwardly directed restoring force; and a restoring force exerting member that exerts an upwardly directed restoring force on the valve member. The float-type backflow prevention valve comprises an annular valve seat; a float that rises in accompaniment to a rise in a water level of wastewater to close the valve at the annular valve seat; a guide member that guides movement of the float in a vertical direction; and a constraining member that constrains a lowermost position to which the float can move.

An odor-trap device (1) for in particular flushing-water-free sanitary devices, for example urinals, comprises an outflow element (2) with a sealing wall (3), and also comprises a sealing membrane (4), which is in sealing contact with the sealing wall (3) in a closure position and, in the presence of a liquid, such as urine, is pushed away from the sealing wall (3) from the closure position into an open position, as a result of which a gap (19) is formed between the sealing membrane (4) and sealing wall (3), it being possible for the liquid to be led away through said gap, and further comprises a mounting element (5) for mounting the sealing membrane (4) in relation to the sealing wall (3). The odor-trap device (1) is characterized in that the seating membrane (4) has a seating surface (6) which runs substantially parallel to the sealing wall (3), wherein the sealing surface (6) butts against the sealing wall (3) substantially with surface-area contact, or wherein the sealing surface (6) is spaced apart from the sealing wall (3) such that the liquid film which is present, at least in part, between the sealing wall (3) and the sealing surface (6) provides a force of adhesion between the sealing wall (3) and seating surface (6).

The present disclosure discloses a magnetic floor drain, comprising a floor drain body and a sealing cover. A straight-through water outlet is provided at a lower part of the floor drain body. A locating surface is provided at one side of the water outlet. At least one fixed magnetic block is provided on the locating surface and all the fixed magnetic blocks are provided in an interval arrangement. One side of the sealing cover is connected flexibly to the locating surface through a hinge structure. At the same time, a movable magnetic block is provided at the hinged side of the sealing cover. Centers of the fixed magnetic block and the movable magnetic block are both located on the axis of the hinge structure. The present disclosure provides an adjustable draining which is simple and useful, convenient to assemble and few accessories needed.

A backflow prevention apparatus is provided with a check valve and a float-type backflow prevention valve, these being installed in this order as one proceeds from upstream to downstream. The check valve comprises a valve seat; a valve member that closes the valve at the valve seat due to an upwardly directed restoring force; and a restoring force exerting member that exerts an upwardly directed restoring force on the valve member. The float-type backflow prevention valve comprises an annular valve seat; a float that rises in accompaniment to a rise in a water level of wastewater to close the valve at the annular valve seat; a guide member that guides movement of the float in a vertical direction; and a constraining member that constrains a lowermost position to which the float can move.

A waterless trap for use in a drain assembly includes flow enhancing features to promote the vortex water flow of water received in the trap, an improved sealing arrangement to enhance the seal between a seal member and the housing to inhibit sewer gas leaks from an attached drain pipe by maintaining an evaporation barrier that assists in retaining water in a corresponding p-trap, and a plurality of air passages can allow the trap seal to open with ease when the drain pipe is pressurized. These features may be used in combination with one another or may be independently employed.