Viega 79245 ProPress adapter Smart Connect technology Zero Lead Bronze, 1'' x 1''

The 79245 is a 1 inch press by 1 inch male pipe thread adapter. The press end crimps onto 1 inch copper tube and the MPT end threads into a 1 inch female NPT port, so it's the transition you use where a copper press run meets a threaded valve, pump, tank fitting, or gauge port.

It's zero lead bronze, which is what you put in drinking water systems. Same fitting works on hydronic heating and compressed air runs, but the zero lead bronze body is the reason it's cleared for potable service.

The press side takes a press tool with a 1 inch jaw. There is no soldering it, and there's no way to make that joint mechanically by hand. Only the MPT side is threaded. If you don't have a press tool on the truck, use a threaded or sweat adapter instead of this one.

No. This is a copper press adapter, and the press end is sized for 1 inch copper tube. PEX and CPVC need their own transition fittings. Reach for the 79245 only where the run is copper.

Smart Connect is a feature of the ProPress sealing element that leaks on purpose if the fitting never got pressed. When you fill and pressure test, an unpressed 79245 weeps at the press end instead of sitting there looking finished, so you find the miss during the test rather than after the ceiling closes. It doesn't change how you make the joint: you still deburr, mark insertion depth, and press with the jaw for the tube size.

Depends which half of the joint carries the thread. The 79245 gives you a male NPT tail, so it goes into a female port: a threaded ball valve, a pump flange, a water heater tapping, a backflow assembly inlet. If the equipment side presents a male nipple, you want the press by female thread version instead. Get this backwards and you end up stacking a coupling to correct it, which adds a leak path.

Viega part number 79245, a 1 inch by 1 inch zero lead bronze ProPress adapter with Smart Connect. Made in Germany. That MPN is what to put on the order or the submittal so you get the bronze body rather than a copper or stainless equivalent.

Only the male-thread ones. The 79245 handles every point where a 1 inch copper run lands in a female NPT port, and stocking it in quantity covers valve tie-ins, gauge and drain taps, and equipment connections across a facility. You'll still need the female-thread adapter for equipment that presents a male nipple, and the same fitting in other tube sizes wherever the riser isn't 1 inch.

The sealing element ships in the fitting, factory installed. Nothing else to buy to make the joint apart from the press tool and jaw. What you do want to check before pressing is that the element is seated and undamaged, since a nicked one is the usual cause of a joint that weeps after test.

Yes on the MPT side. That's an ordinary NPT tapered thread and it seals the same way any threaded joint does, with tape or dope rated for the service. The press end is the only part that seals without a compound. Keep sealant off the press end and out of the sealing element.

Bronze is what you want anywhere the fitting carries a thread. Threaded copper tails gall and deform; a cast bronze body takes the wrench torque of an NPT makeup without distorting. That's why the 79245 is bronze while plain copper to copper couplings and elbows in the same system are not. Zero lead bronze also keeps it in potable service.