When the Trap is subject to syphonic
conditions the automatic hydraulic action allows air to be drawn through the inlet of the Trap and
through the by pass columns thus breaking the syphonic action. On cessation of syphonic conditions
the remaining water falls back to reseal the Trap. The Silentrap ventilates by drawing air through a
Non-Return Valve whereas the Resealing Trap ventilates by drawing air through the inlet of the Trap
and through the water seal
Advantages
The simple non-mechanical
action ensures retention of adequate water seal even under extreme syphonic conditions Eliminates
the need for secondary ventilation
