Double bowl sink 16 In. center outlet waste 1-1/2 In. for kitchen. Insta-Plumb features a push-fit application design for quick and simple installations. Fast and easy connection with no solvent, glues, nuts or washers. Stainless steel grip ring holds the connection tight and an o-ring provides a leak-free seal. Great for hard to reach or confined areas under a sink. Connections can be easily removed and/or adjusted using the release tool (included). Fittings can be reused.