See all products of Zone/diverter ball valves (three-way) Three-way motorised ball zone valve, for heating and cooling systems. Motorised three-way ball diverter valve. Motorised three-way diverter valve. Motorised three-way ball zone valve with telescopic by-pass tee. Motorised three-way ball valve. Motorised three-way ball valve. Motorised three-way ball zone valve, by-pass version.