The vented drain pipe fixes a widespread problem. In many old pipe installations the sewer pipe is poorly ventilated. The line moves - especially for water flow -. Air from the siphon to, and thus makes the actual task to naught, the odor trap. Without aerator it müffelt then quickly out of the drain.
CONCLUSION: The drain pipe was in 10 minutes. fast even installed, just replace the old arch. The valve on the pipe carries out his work in a low hiss, barely audible. The effect is very good. Since then, no odor problems with the drain in the sink more!
