The Ridge Tool and Viega companies merged in 1999 to bring the ProPress System to North America. Since that press fittings, the System has supplied plumbers across the continent with the fittings necessary to perform their tasks.

   According to the Viega website, there are three main causes for leakage in a ProPress system. In the first, you have not properly pressed the fitting in question. If you discover that is the problem, do not attempt to use the pressing jaws on the part until you have checked for flaws in the installation of the copper tubing.

   These press fittings will work well with a slight degree of misalignment. As the Test Equipment website points out, this is normal. However, it is important that you check the fitting for tubes whose alignment with the fitting is grossly inaccurate. Ensure the tubing is even with the supporting fitting.

   According to the Ridgid website, this is a problem that you might find at the press point parting lines where jaw or ring tips intersect. This is a serious problem, as it interferes with the press fittings pressing process. In the former case, a cleaning of the contoured area with metal polishing pads will suffice. If the fins of your jaw set or press ring have suffered damage, however, you will need to discard and replace them.