A hose coupler comprising: a female fitting (102, 602) having a first end connector and a second end connector (106, 606), wherein the first end connector is a female threaded end connector for attachment to a hose or a spigot; a male fitting (108, 608) having a third end connector and a fourth end connector, wherein the third end connector is a male threaded end connector for attachment to a hose or a spigot; and a rotation assembly (105, 632) coupled between the female fitting (102, 602) and the male fitting (108, 608), the rotation assembly comprising: a first rotation member rotatable about a first axis of rotation and having a first longitudinal bore (216, 716) for conveying a fluid; a second rotation member rotatable about a second axis of rotation that is different from the first axis of rotation and having a second longitudinal bore (206, 706) for conveying a fluid; and a single continuous internal channel for conveying a fluid between the female fitting (102, 602) and the male fitting (108, 608), wherein the internal channel comprises at least the first longitudinal bore (216, 716) and the second longitudinal bore (206, 706); characterized in that: the rotation assembly (105, 632) is coupled to a flow control switch, the switch comprising a flow gate disposed within the single continuous internal channel, and the flow control switch being actuatable to control the flow of fluid through the single continuous internal channel; wherein actuation of the flow control switch causes the flow gate to selectively occlude the single continuous internal channel. a female fitting (102, 602) having a first end connector and a second end connector (106, 606), wherein the first end connector is a female threaded end connector for attachment to a hose or a spigot; a male fitting (108, 608) having a third end connector and a fourth end connector, wherein the third end connector is a male threaded end connector for attachment to a hose or a spigot; and a rotation assembly (105, 632) coupled between the female fitting (102, 602) and the male fitting (108, 608), the rotation assembly comprising: a first rotation member rotatable about a first axis of rotation and having a first longitudinal bore (216, 716) for conveying a fluid; a second rotation member rotatable about a second axis of rotation that is different from the first axis of rotation and having a second longitudinal bore (206, 706) for conveying a fluid; and a single continuous internal channel for conveying a fluid between the female fitting (102, 602) and the male fitting (108, 608), wherein the internal channel comprises at least the first longitudinal bore (216, 716) and the second longitudinal bore (206, 706); a first rotation member rotatable about a first axis of rotation and having a first longitudinal bore (216, 716) for conveying a fluid; a second rotation member rotatable about a second axis of rotation that is different from the first axis of rotation and having a second longitudinal bore (206, 706) for conveying a fluid; and a single continuous internal channel for conveying a fluid between the female fitting (102, 602) and the male fitting (108, 608), wherein the internal channel comprises at least the first longitudinal bore (216, 716) and the second longitudinal bore (206, 706); characterized in that: the rotation assembly (105, 632) is coupled to a flow control switch, the switch comprising a flow gate disposed within the single continuous internal channel, and the flow control switch being actuatable to control the flow of fluid through the single continuous internal channel; wherein actuation of the flow control switch causes the flow gate to selectively occlude the single continuous internal channel. the rotation assembly (105, 632) is coupled to a flow control switch, the switch comprising a flow gate disposed within the single continuous internal channel, and the flow control switch being actuatable to control the flow of fluid through the single continuous internal channel; wherein actuation of the flow control switch causes the flow gate to selectively occlude the single continuous internal channel.