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20839 Viega ProPress adapter Smart Connect technology Copper, 4'' x 4''
Manufacturer Resources
Product Specs
- Connection Type:
- P x FPT
- Material Type:
- Copper
- Product Dimension:
- 4'' x 4''
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Adapters
- Product Type:
- Adapter
- Product Length:
- 4.681"
- Product Height:
- 4.803"
- Product Weight:
- 4.404 lbs
- Product Width:
- 5.551"
- Product Material:
- Copper
Viega 20839 – Frequently Asked Questions
1) What type of connections does the Viega 20839 ProPress adapter have?
The Viega 20839 is a P x FPT adapter: one end is a 4 inch ProPress copper socket that gets crimped onto 4 inch copper tube, and the other end is 4 inch female pipe thread for a male-threaded nipple, valve, or pump connection. So it is the transition fitting when you need to leave press and go to threaded pipe.
2) Will the Viega 20839 adapter press onto 4 inch copper tube?
Yes, the press end is sized for 4 inch copper tube. Both ends are 4 inch, so there is no size step in this fitting. If you need to change diameter as well as go to thread, you need a separate reducing fitting.
3) What does Smart Connect mean on the Viega 20839 adapter, and does it change how I install it?
Smart Connect is the feature Viega builds into the sealing element so an unpressed joint leaks visibly during pressure test instead of hiding. It does not change the install sequence: cut square, deburr, mark insertion depth, fully seat the 4 inch tube, then press. It is a check on your work, not a substitute for pressing every joint.
4) Should I use a press x FPT adapter or sweat a threaded adapter on a 4 inch copper line?
On 4 inch copper, a press x FPT adapter like the 20839 avoids heating a large thermal mass and avoids hot work permits, which is usually the deciding factor on occupied buildings and retrofits. Soldering a 4 inch joint takes serious heat and time. The tradeoff is tooling: you need a press tool with 4 inch capability (large diameter ProPress uses a press ring and actuator rather than a standard jaw). If that tool is not on the truck, the press fitting is the wrong choice for that day.
5) I need to tie a 4 inch copper riser into a threaded valve or backflow assembly. Is this the right fitting?
That is exactly what a 4 inch press by female-thread adapter is for. Press it to the copper riser, then thread in the male-end nipple feeding the valve or assembly. For a male-threaded outlet on the copper side instead, you want the MPT version of the adapter, not the 20839.
How fast can I get the Viega 20839 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
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 20839 come with a warranty?
Absolutely. The Viega 20839 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 20839?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
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