Ballcock

s. válvula automática que consiste en un bola hueca flotante que sube y baja y aí abre o cierra la válvula

válvula de flotador

SPA: Valvula de estanque, Valvula de admision
A fill valve device in a toilet tank. It is controlled by a float mechanism that floats in the tank water. When the toilet is flushed, the float drops and opens the ballcock, releasing water into the tank and/or bowl. As the water in the tank is restored, the float rises and shuts off the ballcock when the tank is full.