A remote shut-off valve system comprising: a control module comprising: a housing; a control unit contained within the housing; and a control panel attached to the housing; the control unit comprising: an electric motor having a motor shaft, the motor shaft comprising a threaded rod; a valve comprising a valve member, the valve member having a threaded recess for receiving the threaded rod; and an inlet and outlet for fluid, the valve having an open position in which fluid can flow from the inlet to the outlet and a closed position in which the flow of fluid from the inlet to the outlet is blocked, wherein the valve member is movable between the open and closed positions by a threading and unthreading interaction of the valve member with the threaded rod when the motor is operated, wherein the valve (310, 400) is a hydraulic valve and the fluid is water, wherein the control unit further comprises a body, the motor and the valve being housed within the body, and wherein: i) the control panel comprises a manual control switch (232, 234) configured to control the motor in the control unit; and/or ii) the control module comprises: a receiver, configured to receive signals from a network connected to the Internet; a transmitter, configured to send signals to the network; and a transducer, configured to control the motor in response to a signal received by the receiver, such that the valve member is set to the closed position when an "off" signal is received and to the open position when an "on" signal is received; and a diaphragm valve (310, 400) comprising: an inlet, an outlet, a diaphragm valve member, and a diaphragm valve seat; a first fluid conduit connecting the inlet of the diaphragm valve (310, 400) to the inlet of the control unit; and a second fluid conduit connecting the outlet of the control unit to the outlet of the diaphragm valve (310, 400), the diaphragm valve member having a closed position in which it engages the diaphragm valve seat and blocks the flow of fluid from the inlet of the diaphragm valve (310, 400) to the outlet of the diaphragm valve (310, 400) and an open position in which the diaphragm valve member does not engage the valve seat and fluid can flow from the inlet of the diaphragm valve (310, 400) to the outlet of the diaphragm valve (310, 400), wherein when the valve of the control unit is in the closed position a pressure at the inlet becomes higher than a pressure at the outlet causing the diaphragm valve member to move to a closed position and engage the diaphragm valve seat a control module comprising: a housing; a control unit contained within the housing; and a control panel attached to the housing; the control unit comprising: a housing; a control unit contained within the housing; and a control panel attached to the housing; the control unit comprising: an electric motor having a motor shaft, the motor shaft comprising a threaded rod; a valve comprising a valve member, the valve member having a threaded recess for receiving the threaded rod; and an inlet and outlet for fluid, the valve having an open position in which fluid can flow from the inlet to the outlet and a closed position in which the flow of fluid from the inlet to the outlet is blocked, wherein the valve member is movable between the open and closed positions by a threading and unthreading interaction of the valve member with the threaded rod when the motor is operated, wherein the valve (310, 400) is a hydraulic valve and the fluid is water, wherein the control unit further comprises a body, the motor and the valve being housed within the body, and wherein: i) the control panel comprises a manual control switch (232, 234) configured to control the motor in the control unit; and/or ii) the control module comprises: a receiver, configured to receive signals from a network connected to the Internet; a transmitter, configured to send signals to the network; and a transducer, configured to control the motor in response to a signal received by the receiver, such that the valve member is set to the closed position when an "off" signal is received and to the open position when an "on" signal is received; and i) the control panel comprises a manual control switch (232, 234) configured to control the motor in the control unit; and/or ii) the control module comprises: a receiver, configured to receive signals from a network connected to the Internet; a transmitter, configured to send signals to the network; and a transducer, configured to control the motor in response to a signal received by the receiver, such that the valve member is set to the closed position when an "off" signal is received and to the open position when an "on" signal is received; and a receiver, configured to receive signals from a network connected to the Internet; a transmitter, configured to send signals to the network; and a transducer, configured to control the motor in response to a signal received by the receiver, such that the valve member is set to the closed position when an "off" signal is received and to the open position when an "on" signal is received; and a diaphragm valve (310, 400) comprising: an inlet, an outlet, a diaphragm valve member, and a diaphragm valve seat; an inlet, an outlet, a diaphragm valve member, and a diaphragm valve seat; a first fluid conduit connecting the inlet of the diaphragm valve (310, 400) to the inlet of the control unit; and a second fluid conduit connecting the outlet of the control unit to the outlet of the diaphragm valve (310, 400),