Viega 95315 MegaPress coupling No stop Smart Connect technology 304 stainless steel, 3/4'' x 3/4''

A no-stop coupling has no internal pipe stop, so it slides freely along the pipe. That's what you want for a repair or tie-in where you can't spring or pull the pipe apart: cut out the bad section, slide the coupling fully onto one side, bring the new piece up, then slide it back to center and press both ends. A stop coupling butts each pipe against an internal shoulder and is the better choice for new runs where you want the insertion depth set for you. The 95315 joins 3/4 inch to 3/4 inch.

Smart Connect is a deliberate feature in the sealing element that lets a small amount of liquid or air escape at an unpressed connection during pressure testing. The point is that an unpressed joint shows itself on the test instead of showing itself after the wall closes. On the 95315 that applies to both ends, since both are press connections.

The coupling measures 3.012 inches in length with a 1.496 inch height and width, so the body itself is compact. Plan clearance around that for the press jaw, not just the fitting, since the tool ring needs to seat square on each end and you press both ends separately. At 0.287 lbs it won't load the pipe while you align it.

Yes for stainless runs. The body is 304 stainless, which is the material you want where you're joining stainless pipe or where the carbon steel version would create a dissimilar metal problem. If the whole system is black iron in a dry mechanical room, the carbon steel MegaPress coupling is the usual pick; the stainless version is what you specify for corrosion exposure or stainless pipe.

Order Viega part 95315. That is the 3/4 inch by 3/4 inch no-stop coupling in 304 stainless, made in Germany. One model, no finish or size options to pick on it.