Viega 98370 MegaPress coupling No stop Smart Connect technology 316 stainless steel, 4'' x 4''

A no-stop coupling has no internal shoulder between the two press ends, so the fitting can slide freely along the pipe. That is what lets you use it as a repair coupling: cut out a damaged section, slip the coupling fully onto one side, bring the new piece in, then slide it back to center and press both ends. A standard stop coupling would butt against the pipe end and could not be positioned that way. The 98370 is a 4 inch x 4 inch coupling with press connections on both ends.

It is made of 316 stainless steel, the grade specified where chloride exposure, washdown, coastal air, or chemical service would attack 304 or carbon steel. That makes it a fit for food and beverage plants, marine-adjacent mechanical rooms, and process lines where the piping itself is stainless. The fitting is made in Germany.

The coupling body itself measures 7.874 inches long with a 5.185 inch height and width, so plan for that envelope plus the swing of a 4 inch press ring and the actuator behind it. In tight chases or close to a wall, that ring diameter, not the fitting, is usually what decides whether the joint can be made. The coupling weighs 3.705 lbs, light enough to support by hand while positioning on a slide-in repair.

Smart Connect is a feature of the sealing element that leaves an unpressed connection detectable during pressure testing, so a joint you missed shows itself before the system goes into service rather than after. On a 4 inch repair where you are making two presses in a confined spot, that is the check that keeps an unpressed end from being buried behind insulation or a ceiling.