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77427 Viega ProPress tee Smart Connect technology Copper, 1'' x 3/4'' x 1''
Manufacturer Resources
Product Specs
- Connection Type:
- P1 x P2 x P3
- Material Type:
- Copper
- Product Dimension:
- 1'' x 3/4'' x 1''
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Tees
- Product Type:
- Tee
- Product Length:
- 1.5"
- Product Height:
- 2.429"
- Product Weight:
- 0.447 lbs
- Product Width:
- 3.937"
- Product Material:
- Copper
Viega 77427 – Frequently Asked Questions
1) What pipe sizes does the Viega 77427 ProPress tee connect?
The Viega 77427 is a reducing press tee sized 1 inch x 3/4 inch x 1 inch. The run is 1 inch on both ends and the branch outlet is 3/4 inch, so you press it into a 1 inch copper main and take a 3/4 inch branch off it. All three ends are press connections (P x P x P), not threaded or sweat.
2) Do I need solder or a torch to install the Viega 77427 tee?
No flame or solder. The 77427 is a copper press fitting, so it is installed cold with a press tool and the correct jaws for each size, 1 inch jaws on the run and 3/4 inch on the branch. That makes it usable in occupied buildings and other spots where a hot work permit is a problem.
3) Which end of the 1 x 3/4 x 1 ProPress tee is the 3/4 inch branch?
On a tee written 1 x 3/4 x 1, the middle number is the branch. So the 77427 has a 3/4 inch branch outlet with 1 inch ends on the straight run. If you need the reducer on the run instead of the branch, this is the wrong configuration.
4) What does Smart Connect technology on this Viega tee actually do for the installer?
Smart Connect is Viega's unpressed-connection feature: a deliberate leak path at the sealing element so an unpressed joint weeps visibly during pressure testing instead of passing inspection and failing later. On a 1 x 3/4 x 1 tee with three ports to press, that is the practical value, it flags the port you missed before the wall closes up.
5) Can I use the Viega 77427 press tee on copper potable water lines?
Yes, it is a copper-bodied press tee for copper tube systems, so it is at home on domestic hot and cold copper piping. Press it onto hard-drawn type L or type M copper of the matching 1 inch and 3/4 inch nominal sizes. It is not a fitting for PEX or steel pipe.
6) How much room do I need to fit the Viega 77427 tee between joists or in a tight chase?
Plan around a fitting envelope of 3.937 x 2.429 x 1.5 inches. Add clearance for the press jaws, which need to swing fully around each port, and that is usually what limits the install rather than the fitting body itself. The tee weighs 0.447 lbs.
7) What part number should I order for a 1 x 3/4 x 1 ProPress copper tee?
Viega part number 77427. That is the ProPress copper reducing tee, 1 inch x 3/4 inch x 1 inch, made in Germany. Order by the 77427 number to avoid landing on the all-1-inch tee or the bronze version.
8) Is a press tee or a reducing bushing better for taking a 3/4 inch branch off a 1 inch copper main?
A purpose-made reducing tee like the 77427 is one fitting and three presses. Running a full 1 inch tee and then adding a 1 x 3/4 reducer gives you a fourth joint, more length in the chase, and another place to leak. Use the 1 x 3/4 x 1 tee when the branch is genuinely 3/4 inch and the run stays 1 inch the whole way through.
How fast can I get the Viega 77427 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Viega 77427 come with a warranty?
Absolutely. The Viega 77427 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Viega 77427?
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