Does anyone know of a retail source for tri-clamp fittings and similar Brewers hardware in the Seattle area? I could also go a bit further north to Edmonds or Everett.
Have you asked at Larry's Brew Supply in Kent? They have a welder on staff who does a lot of brew equipment. If they don't carry them, they may know where to get them.
7405 South 212th Street #103, Kent, WA 98032
(253) 872-6846
Homebrew heaven has some. But you would be way better off buying from an online retailer such as Brewers Hardware. Much cheaper and they have everything you need. Most homebrewers don't ever get committed enough to the hobby to dump cash into that kind of stainless so shops don't cater to it as much.