There's a station at Siete Aguas used by the train service of Renfe Cercanias. The direction you may take to arrive in Siete Aguas, if you come from Valencia, is Buñol. Travel by train is the best way of getting to Siete Aguas when, for example, a member of the family needs to do something in Valencia but not the other. Also it's useful with one day return ticket, to visit everything you want in Valencia.

Here you have a link to Renfe's webpage, there you can plan your trip to valencia with the timetable, in order to get to Valencia quick and without waiting time:

RENFE: Comunidad Valenciana

You should select Valencia, if it's your destination, and the timetable will appear.