The return bend features solder cups and cleanout with plug. The fitting provides a water seal, preventing unwanted gases to enter the dwelling. The cleanout provides a means of clearing potential clogs in certain portions of the drainage system. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects. NIBCO® copper fittings are manufactured in an ISO 9001 certified facility, and backed by a 50-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, NIBCO is the preferred brand in the industry.
Copper Fittings Installation Instructions
- Dezincification resistant
- ASTM B584 Alloy C84400
- Material and workmanship per ASME B16.23
Copper Fittings Installation Instructions
Manufacturer Resources
Product Specs
- All Application(s):
- DWV Drain / Waste / Vent
- All Basic Material:
- Bronze
- Classification:
- Solder DWV Return Bends
- End Connection:
- Threaded
- Fitting Bend Angle:
- 180 Deg (1/2 Bend)
- Metal End Connection Type:
- C x C
- Product Group:
- Fitting
- Product Type:
- Solder DWV Return Bends
- System Use:
- Commercial Plumbing, Residential Plumbing
- Product Subgroup:
- Return Bend
- Department:
- Plumbing
Nibco E530350 – Frequently Asked Questions
1) What pipe sizes does the Nibco 878 DWV return bend come in?
Two sizes: 1-1/4 inch (MPN E530250) and 2 inch (MPN E530350). Both are the same C x C x cleanout-with-plug configuration, so pick the size to match your copper DWV line.
2) How do the ends on the Nibco 878 return bend connect to copper tube?
Both run ends are solder cups, listed as C x C, so the fitting slips over copper DWV tube and is soldered. The third opening is a threaded cleanout that ships with a plug.
3) Can I use the Nibco 878 return bend on a pressure water line?
No. It is a DWV fitting for drain, waste and vent service only. DWV fittings are not rated for pressure supply piping; use pressure-rated copper fittings there.
4) Is the Nibco 878 a 180 degree bend or a 90?
It is a full 180 degree return bend, called out as a 1/2 bend. It turns the drain line back on itself rather than making a quarter turn, so it is not a substitute for a DWV elbow.
5) What is the cleanout opening on this return bend actually for?
The threaded cleanout plug gives you access to rod or snake that section of the drain if it clogs, without cutting the soldered joints apart. The bend itself holds a water seal that blocks sewer gas from entering the building.
6) What material is the Nibco 878 return bend cast from?
Cast bronze, ASTM B584 alloy C84400, and dezincification resistant. Material and workmanship follow ASME B16.23, the standard for cast copper alloy DWV fittings.
7) Does the 878 return bend include the cleanout plug or do I order it separately?
The plug is included. The fitting ships as C x C x cleanout with plug, so nothing beyond solder, flux and the tube itself is needed to make up the joint.
8) Is this return bend acceptable for commercial buildings or only houses?
Both. Nibco lists the 878 for commercial and residential plumbing, so the same fitting covers multi-family risers and single-family drainage work.
How fast can I get the Nibco E530350 delivered?
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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 Nibco E530350 come with a warranty?
Absolutely. The Nibco E530350 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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