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90890 Viega MegaPress transition coupling Smart Connect technology 316 stainless steel, 1-1/4" x 1-1/4"
Manufacturer Resources
Product Specs
- Connection Type:
- P1 x P2 (CTS)
- Material Type:
- 316 Stainless Steel
- Product Dimension:
- 1-1/4" x 1-1/4"
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Couplings
- Product Type:
- Transition Coupling
- Product Length:
- 3.996"
- Product Height:
- 2.205"
- Product Weight:
- 0.626 lbs
- Product Width:
- 2.205"
- Product Material:
- 316 stainless steel
Viega 90890 – Frequently Asked Questions
1) What size pipe does the Viega 90890 MegaPress coupling press onto?
The Viega 90890 MegaPress transition coupling is a 1-1/4 inch by 1-1/4 inch fitting, so both ends press onto 1-1/4 inch pipe. Connection type is listed as P1 x P2 (CTS), meaning one press end is sized to the CTS dimension rather than matching the other end's pipe standard, which is what makes it a transition fitting rather than a straight coupling.
2) Is the Viega 90890 coupling stainless steel or carbon steel?
It is 316 stainless steel throughout, not carbon steel. 316 is the higher-molybdenum austenitic grade, which is why it gets specified where a carbon steel press fitting would corrode. Order the 316 stainless version to match stainless pipe runs, and keep carbon and stainless press fittings separated on the job so a galvanic pairing does not end up in the wall.
3) Will the Viega 90890 join two different pipe standards in one fitting?
That is what it is built for. The connection is called out as P1 x P2 (CTS), two differently specified press ends on one body, so it bridges from one pipe standard to the other without an adapter or a threaded nipple in between. For a straight run of identical pipe on both sides you want a plain coupling instead, not a transition.
4) How much space do I need to fit the Viega 90890 MegaPress coupling in a tight chase?
The body measures 3.996 inches on its length, with height and width both at 2.205 inches, and it weighs 0.626 lbs. Those are the fitting's own dimensions only. You still need clearance beyond that for the press jaw to wrap the fitting and rotate, so plan the chase or joist bay around the tool, not the coupling.
5) What does Smart Connect technology do on the Viega 90890 fitting?
Smart Connect is Viega's unpressed-connection feature. It lets a small amount of fluid pass at an unpressed joint during pressure test, so a connection the installer missed shows itself before the wall closes up rather than after. On a multi-fitting riser that is the difference between finding one skipped press on test day and chasing a leak later.
6) Do I need a special press tool for a 1-1/4 inch MegaPress stainless fitting?
Yes. MegaPress joints are made with a press tool and the jaw or ring matched to the fitting size, in this case 1-1/4 inch. There is no threading, soldering or welding involved, and no solvent. If your crew only carries jaws for copper press sizes, confirm you have the MegaPress 1-1/4 inch jaw or ring on the truck before scheduling the tie-in.
7) What is the Viega part number and where is the 90890 coupling made?
The manufacturer part number is 90890, sold under the Viega MegaPress line, and it is made in Germany. Use 90890 when you are matching it against a submittal or reordering to keep a building's press fittings standardized.
How fast can I get the Viega 90890 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 90890 come with a warranty?
Absolutely. The Viega 90890 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 90890?
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selection,
installation tips, and troubleshooting. Contact Us
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