An integrated variable pressure and flow regulator comprising a manifold body, a pressure regulator, a flow control valve, a flow meter and a flow diverter. The manifold body includes a coupling face to which the pressure regulator is attached, a flow control valve cavity which receives the flow control valve, a flow meter cavity which receives the flow meter and a flow diverter cavity which receives the flow diverter. A central fluid transfer passageway of the manifold connects an inlet with outlet ports in fluid communication through the cavities. The pressure regulator maintains an outlet fluid pressure less than inlet fluid pressure as per a reducer pressure at outlet ports. The flow control valve maintains an outlet fluid flow rate, as per a flow rate setting, for the fluid flow at the outlet fluid pressure. The flow diverter allows to selectively divert the fluid through any of the outlet ports.