Sorry about the year/model lack. I thought it was in my signature and see it isn't. We have a 2001 Patriot Ticonderoga. Our water manifold is white and has lots of silver knobs in pairs (hot/cold) going down vertically, the city water inlet, cable/phone, etc. I will look tomorrow morning to see if there is a spare shutoff. For now we just turned off incoming water at the source. Sadly no part number on the valve, but there are good RV parts available (tomorrow) nearby and large plumbing supply. Thanks for the suggestion! I will edit my signature line and apologize for the sloppy details in my earlier post.