The pipes are removable/reusable with an integrated press release collar and can be re-positioned for perfect alignment. This kit features a stainless steel grip ring that holds the connection tight and an o-ring for a leak-free seal so you can install with confidence. Combine this item with other Insta-Plumb products to complete your under sink drainage project quickly, easily and reliably. It is not for use with brass tubing, pipes under pressure or potable water.