Water drain assembly, particularly for drainage systems Siphon roof

摘要

A set water drain (1), particularly for systems siphonic roof drainage, which extiendeesencialmente along an axis (A) and including a base (2) body having an inlet hole of water ( 10), and an anti cover (4) positioned to protect the hole (10) and transport water to the body (2) eincluyendo an upper disc (40) and a plurality of radial vanes (41) projecting from a bottom face ( 42) of the disc (40); including the drain assembly a first set of blades (41a) and a second deálabes set (41b) circumferentially alternate, characterized in that the blades (41b) of the second variable-tienenanchura set along the blade and different shape of the blades (41a ) of the first set.