Viega 91305 MegaPress coupling No stop Smart Connect technology 316 stainless steel, 1-1/4" x 1-1/4"

The Viega 91305 MegaPress coupling is a 1-1/4 inch by 1-1/4 inch fitting, so it joins two runs of 1-1/4 inch pipe press-to-press. Both ends are press connections (P1 x P2), meaning no threading, welding, or soldering at either end.

A no-stop coupling has no internal shoulder in the middle, so pipe can slide all the way through from either side. That is what you want on a repair or a tie-in where you cannot pull the pipe apart to seat it against a stop: slide the coupling onto the existing line, bring the new section in, then position and press both ends. On a standard stop coupling the pipe seats against a center ridge, which sets insertion depth for you but requires the pipe ends to be free to move. With the no-stop version you have to mark your own insertion depth on both pipes before pressing.

No. Both ends are press connections, so the joint is made cold with a press tool and the correct 1-1/4 inch jaw. No open flame means no hot work permit and no fire watch, which is the usual reason it gets specified for occupied buildings, hospitals, and schools. Cut the pipe square, deburr, mark insertion depth, press.

It is built from 316 stainless steel, the more corrosion-resistant of the two common MegaPress bodies. That matters on wet, washdown, coastal, or chemically aggressive service where a carbon steel press fitting would surface-rust. Note that MegaPress fittings are made for steel pipe systems, not for copper tube, which uses the ProPress line instead.

Smart Connect is Viega's unpressed-connection feature. On a system test, a fitting that was missed leaks visibly at low pressure rather than holding and failing later, so the installer can find the skipped joint before the wall closes up. On a large run of 1-1/4 inch joints that is the difference between one walkthrough and a callback.