According to the present invention, the water pipe can be connected by a water pipe without separately preparing a space for joining the constant flow valve and the pressure reducing valve, and no piping work is required for connection. To be connected.;An inlet coupling 10 is provided at one end of the body 1, an outlet coupling 11 is provided at the other end of the body 1, and a still water valve base 17 is provided inside the body 1, In the still water front (V) provided with the steering wheel 19 for operation on the outer surface side of the body 1, the constant flow rate valve z is provided downstream of the still water valve mechanism 17 inside the body 1, The water flow flowing into the body 1 of the inlet coupling 10 flows through the low flow valve Z to the side of the outlet coupling 11.
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