A remote control valve which regulates a reverse osmosis water purifier with only fluid connections between the control valve and the water purifier, no mechanical, electrical, or other such connections, being necessary. The control valve includes: a valve body having a purified water inlet, a brine inlet and a brine return outlet all connectible to the water purifier, having a waste outlet connectible to a drain, and having a purified water discharge outlet; a brine inlet valve controlling flow into the valve body through the brine inlet; manually operable means for opening the brine inlet valve; means for directing brine flow from the brine inlet to the brine return outlet upon opening of the brine inlet valve so as to pressurize the purified water in the water purifier, whereby purified water is delivered to the purified water discharge outlet; brine bleed means for metering brine from the brine inlet to the waste outlet when the brine inlet valve is closed; and purified water bleed means for delivering excess purified water to the waste outlet when the brine inlet valve is closed, thereby reducing the pressure on the purified water to atmospheric. A purified water nozzle means connects the purified water inlet to the purified water discharge outlet and bypasses the purified water bleed means when the brine inlet valve is open. A check valve means prevents brine flow through the waste outlet when the brine inlet valve is open, thereby directing all of the brine flow back to the water purifier by way of the brine return outlet.