As part of a discussion here at " The Florida Mini Rally" I said that I had a link to Norgren part numbers for the valves used on our coaches. I purchase my valves and parts directly from Norgren. Here is a link to the parts list
http://www.norgren.com/document_reso..._Nug%20200.pdf

Truk said he would post it somewhere under spare parts so it would be easy to find.