An adjustable drain assembly is disclosed. The adjustable drain assembly may have a main drain body with a series of springable flanges and extension calibration elements. Other components of the adjustable drain assembly may provide fluid conduits from various drains, such as of a bath tub, and may connect to the main drain body. These other components may be insertable into the springable flanges and may have extension calibration elements interlockable with the extension calibration elements of the main body. A collet may be disposable about the springable flanges and configured to retain the extension calibration elements in fixed interlocking relation. In this manner, the other components may be adjustably positioned in lengthwise relation relative to the main drain body, then secured in position by the fixation of the extension calibration elements in fixed interlocking relation.

A backflow prevention assembly is configurable with varying lay-lengths and orientations. The assembly includes coupling assemblies and valve bodies that adjust in length and/or rotation to allow for the varying lay-lengths and orientations of the backflow prevention valves and assemblies with and without certification. A coupling assembly is connected to a backflow prevention valve and includes an outer sleeve and an inner sleeve that is slidingly received within the outer sleeve. The lay-length is adjusted by slidably moving the inner and outer sleeves with respect to one another.

A flexible dual duct coupling, comprising: a coupling body having an inner flow passage and an outer flow passage therethrough; a first nut assembly configured for reversible attachment to the coupling body; and, a second nut assembly configured for reversible attachment to the coupling body, wherein the second nut assembly is opposite the first nut assembly.

A backflow prevention assembly is configurable with varying lay-lengths and orientations. The assembly includes coupling assemblies and valve bodies that adjust in length and/or rotation to allow for the varying lay-lengths and orientations of the backflow prevention valves and assemblies with and without certification. A coupling assembly is connected to a backflow prevention valve and includes an outer sleeve and an inner sleeve that is slidingly received within the outer sleeve. The lay-length is adjusted by slidably moving the inner and outer sleeves with respect to one another.

A pipe system includes a first pipe section and a second pipe section arranged, and together defining a total length, along a longitudinal axis. The first and second pipe sections are movable with respect to each other so as to shorten or lengthen the total length. A fixation member clamps a portion of the second pipe section to a portion of the first pipe section. The fixation member includes an insulator which is electrically insulating and passes no electrical current between the first and second pipe sections.

Disclosed are embodiments of a coupling mechanism that can be used to selectively secure two sections of telescopically engaged pipe in a fixed position relative to each other and provide a fluid (e.g., gas and/or liquid) seal between to the coupling mechanism and the two pipes, regardless of whether the pipes are secured in the fixed position or are freely moveable relative to each other. In some embodiments, the coupling mechanism can be used as part of a faucet assembly, which can include an adjustable faucet assembly including the telescopically engaged pipe.

A backflow prevention assembly is configurable with varying lay-lengths and orientations. The assembly includes coupling assemblies and valve bodies that adjust in length and/or rotation to allow for the varying lay-lengths and orientations of the backflow prevention valves and assemblies with and without certification. A coupling assembly is connected to a backflow prevention valve and includes an outer sleeve and an inner sleeve that is slidingly received within the outer sleeve. The lay-length is adjusted by slidably moving the inner and outer sleeves with respect to one another.

An assembly of a male coupling part 200 and a stiff tube 100 is disclosed, the stiff tube 100 having an attachment means 110; and the male coupling part 200 requiring a relative axial displacement between the male coupling part 200 and the stiff tube 100 for connecting to a female coupling part 500, the male coupling part 200 comprising an axial through opening 210. The Assembly further comprises an element 300 detachably connected to the male coupling part 200 and slidably attached to the stiff tube 100, the element 300 having an opening 310 allowing relative axial displacement 340 between the male coupling part 200 and the stiff tube 100, and the attachment means 110 being movable within the opening 310. A method for coupling and un-coupling the assembly to a female coupling part is also disclosed.

A refrigerator includes: an evaporator housing provided behind a storage and including an evaporator for cooling the storage; a machine room disposed below the storage and provided with a discharge plug connected to the evaporator housing; a defrost tray installed in a lower portion of the machine room to collect defrost water discharged through the discharge plug; and a drain hose assembly connecting the discharge plug and the defrost water tray to allow the defrost water to flow toward the defrost water tray. The drain hose assembly includes a drain cap connected to the discharge plug and limiting introduction of external air into the evaporator housing and a drain hose having one end connected to the drain cap and another end connected to the defrost water tray, and a length of the drain hose assembly is adjustable by joining between the drain cap and the drain hose.

A drain pipe assembly for installation of a basin includes: a drain pipe which is inserted in a drain port formed in a base of basin and has a flange of which an upper end is caught by the drain port; and a fastening member which fixes the basin against the flange, wherein the fastening member pulls the drain pipe, which is exposed below the basin, in a downward direction, to upwardly press the basin, thereby fastening the basin and the drain pipe.