CK's Plumbing & Backflow, LLCLogo Design Contest Logo Design Contest Contests / CK's Plumbing & Backflow, LLC CK's Plumbing & Backflow, LLC has selected their winning logo design. For $500 they received 100 designs from 18 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by Bellido Return to Contest Return to Contest Withdrawn New #6 Withdrawn New #5 Discussion No comments yet.