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The P-Trap features a solder x slip joint connection and union joint. The fitting provides a water seal, preventing unwanted gases to enter the dwelling. 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 Traps
- End Connection:
- Solder
- Metal End Connection Type:
- C x SJ
- Product Group:
- Fitting
- Product Type:
- Solder DWV Traps
- System Use:
- Commercial Plumbing, Residential Plumbing
- Type of Trap:
- P-Trap;with Union Joint;L.A. Pattern
- Product Subgroup:
- Trap
- Department:
- Plumbing
Nibco E600400 – Frequently Asked Questions
1) What do the C x SJ ends on the Nibco 892 P-trap connect to?
One end is a solder cup (C) that sweats onto copper DWV tube, and the other is a slip joint (SJ) that takes a slip nut and washer on the fixture tailpiece. So the trap solders into the copper drain line on one side and makes a serviceable, non-soldered connection at the fixture on the other. Sizes are 1-1/2 inch and 2 inch.
2) Which size Nibco 892 trap do I need for a lavatory versus a kitchen sink or floor drain?
The 892 comes in 1-1/2 inch and 2 inch. Lavatories and most kitchen sinks run 1-1/2 inch; 2 inch is for the heavier drains, tubs, showers and larger commercial fixtures. Match the trap to the tailpiece and the drain stub you are soldering into, since neither end will adapt sizes on its own. Order part E600350 for 1-1/2 inch or E600400 for 2 inch.
3) What does the union joint on the 892 trap actually get me on the job?
The union lets you break the trap apart without cutting or unsweating the soldered line. Clear a stoppage, pull the trap for cleaning, or swap a fixture, and the trap comes off at the union and the slip nut. On a soldered copper DWV system that is the difference between a ten minute service call and a torch job.
4) Is the Nibco 892 trap brass or copper?
Cast bronze, ASTM B584 alloy C84400, with material and workmanship per ASME B16.23. It is dezincification resistant, which matters on potable-adjacent waste lines and in aggressive water where a plain brass tubular trap corrodes out. This is a cast DWV fitting, not thin-wall tubular trap material.
5) Can I use a cast bronze P-trap like the Nibco 892 on a commercial job, or is it residential only?
Both. The 892 is rated for commercial and residential plumbing, on DWV drain, waste and vent systems. Cast bronze with a union joint is the usual spec where a tubular chrome trap would not survive the traffic, such as school restrooms, hospitals and multi-family.
6) Should I use a soldered cast bronze trap or a plastic tubular P-trap?
A tubular plastic or chrome trap is fine for an exposed lavatory where it can be taken apart by hand and replaced cheaply. The 892 is the choice when the trap is soldered into a copper DWV line, when it is concealed or inaccessible, when it has to hold up to commercial use, or when the spec calls out cast bronze. It sweats into the copper on the drain side and still keeps a serviceable slip joint at the fixture.
7) Any risk of damaging the union when I solder the Nibco 892 into a copper drain line?
Break the trap apart at the union before you sweat the solder cup. Heating the fitting with the union made up can cook the joint seat and any washer in it. Solder the cup end to the copper stub, let it cool, then reassemble the union and make up the slip joint at the tailpiece. Nibco publishes copper fitting installation instructions covering the soldering procedure.
8) What is an L.A. pattern P-trap and does it change how it installs?
The 892 is an L.A. pattern trap, a P-trap body proportioned to the Los Angeles pattern commonly called out in West Coast plumbing specs. It functions like any P-trap: the bend holds a water seal that blocks sewer gas from entering the building. If your drawing specifies L.A. pattern with union, this is that fitting.
9) Does the Nibco 892 trap come with the slip joint nut and washer?
The slip joint end accepts a standard slip nut and washer for the fixture tailpiece, and you will also need solder, flux and a fitting brush for the soldered end. Plan the tailpiece hardware and solder supplies into the order so the trap is not sitting on the bench waiting on a washer.
10) Is this the right trap for a copper sustainable or green building spec?
It fits that use. The 892 is cast bronze in a copper DWV fitting line, and copper's reusability makes it suitable for sustainable projects. Nibco copper fittings are made in an ISO 9001 certified facility, and the fitting meets ASTM B584 alloy C84400 with workmanship per ASME B16.23 if the submittal needs a standard cited.
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Does the Nibco E600400 come with a warranty?
Absolutely. The Nibco E600400 is backed by a manufacturer’s warranty.
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