Ground joint unions WITH BRASS SEATS Made of best grade of malleable iron with inserted brass ring. Made with ball joint, uniform in strength, suitable for all purposes where a union is required. For steam working pressure up to 150 lbs. Galvanized. Advertisements Share this:TwitterFacebookGooglePinterestEmailTumblrPrintLike this:Like Loading... This entry was posted in Hardware, Uncategorized and tagged art, design, hardware, illustration, plumbing, vintage. Bookmark the permalink.