Minimizes evaporation within the trap Prevents sewer gases from escaping into the room and helps to mitigate backflow Seal opens to allow the flow of drainage and closes when there is no flow Alternative to a trap primer eliminating the need to pour water down the drain Can be used in new construction or retrofit applications Quick and simple installation - no special tools needed Fits 3" floor or shower drains 34 GPM flow rate Durable EPDM construction Meets ASSE 1072-2020 UPC Listed