Hi Dani. Thanks for contacting Tundra Restaurant Supply with your question. For all parts related to the CHG Encore KN53-1000 Pre-Rinse Assembly (and pretty much any piece of equipment or commercial kitchen product you've got) you can order replacement parts directly through us. The company actually started in parts, and we're always happy to help customers find the pieces they need to keep their kitchen up and running. That said, I suggest giving a member of our team a call at 1-888-388-6372 (with your KN531000BR model # handy) and we'll help you determine the problem and track down the part(s) you'll need to fix your pre-rinse assembly.