3P overflow Siphon. To avoid odor nuisance, the overflow from the rainwater tank to the sewer system should be equipped with an overflow siphon. The large height of the siphon ensures good protection against sewer odors even in long droughts. The angled inlet allows effective drainage of the contaminated surface layer (skimmer effect). An integrated stainless steel grille prevents small pests from entering

Advantages:
-Extra depth against drying out and sewer odors
-Buffered inlet for improved drainage of the contaminated surface layer.
-Because of an integrated vermin screen, in a separate sleeve, easily accessible during maintenance