This is a single installation where the current electrical geyser has been switched of and the water valve (tap) at the geyser has been turned off. There is only a single gas bottle in this option.

This is a double installation where the current electrical geyser has been switched of and the water valve (tap) at the geyser has been turned off. There is two gas bottles which can be switched between if the one bottle is empty.

This is a dual installation where the current electrical geyser can be switched to any time by opening and closing the water valves (taps). By just changing the direction of the cold water either the electrical or gas geyser can be used. The electrical geyser should still be switched off when the Gas Water Geyser is in use.