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79730 Viega ProPress union Smart Connect technology Zero Lead Bronze, 1/2'' x 1/2''
Manufacturer Resources
Product Specs
- Connection Type:
- P x MPT
- Country Of Origin:
- Made In Germany
- Material Type:
- Bronze
- Product Dimension:
- 1/2'' x 1/2''
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Unions
- Product Type:
- Union
- Product Length:
- 1.102"
- Product Height:
- 1.181"
- Product Weight:
- 0.326 lbs
- Product Width:
- 1.535"
- Product Material:
- Bronze
Viega 79730 – Frequently Asked Questions
1) What kind of connection does the Viega 79730 ProPress union have on each end?
It's a press-by-male-thread union: one end is a 1/2 inch ProPress socket that goes onto 1/2 inch copper tube, and the other is 1/2 inch male pipe thread. So you press one side and thread the other into a valve, pump, or threaded female port.
2) Can I press the Viega 79730 onto PEX or steel pipe?
No. The press end is a ProPress copper socket, sized for 1/2 inch copper tube. PEX needs Viega's PureFlow press system and steel needs MegaPress fittings, both of which use different fitting bodies. The MPT end will thread into any matching 1/2 inch female pipe thread regardless of what the rest of the system is.
3) Can I use the Viega 79730 union on a potable water line?
Yes. The body is zero lead bronze, which is what's used for potable water service. It's a plumbing fitting for 1/2 inch copper systems on the press side.
4) What does Smart Connect do on a Viega ProPress fitting?
Smart Connect is Viega's unpressed-connection feature: if a fitting gets left unpressed during pressure testing, it leaks so you find it before the wall closes up. The 79730 union carries it, so an unpressed joint shows itself on test rather than after startup.
5) Why use a press union instead of just a press coupling on a 1/2 inch copper line?
A coupling is permanent once pressed. A union gives you a disconnect point, and the 79730 pairs that with a male thread, so you can break the line at a pump, water heater, backflow device, or meter for service without cutting pipe. Use a coupling where you'll never need to take it apart; use this where something downstream has to come out.
6) Do I need sealant or tape on the threaded side of the Viega 79730?
The MPT end is a standard tapered male pipe thread and seals the normal way, with thread sealant or PTFE tape on the threads. The press end seals on the O-ring inside the socket, so nothing goes on that side, just a clean, deburred, properly inserted tube and a full press.
7) How much room do I need to fit the Viega 79730 union in a tight chase?
The fitting measures 1.181 x 1.102 x 1.535 inches and weighs 0.326 lbs. Remember you also need clearance for the press tool jaw to close squarely around the press end, which takes more space than the fitting itself.
8) Is the Viega 79730 union the right part number for 1/2 inch, and where is it made?
Model and manufacturer part number is 79730, sized 1/2 inch by 1/2 inch, made in Germany. If you need a different size in the same press-by-thread union style, you'd be looking at a different Viega part number.
How fast can I get the Viega 79730 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 79730 come with a warranty?
Absolutely. The Viega 79730 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 79730?
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installation tips, and troubleshooting. Contact Us
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