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11/4X1X3/4 GALV MI TEE
Manufacturer Resources
Product Specs
- Dimensions Specification:
- ASME B16.3
- End Conn Size 1:
- FPT
- End Conn Size 2:
- FPT
- End Conn Size 3:
- FPT
- Finish Specification:
- ASTM A-153
- Material Specification:
- ASTM A-197
- Pressure Rating Specification:
- ASME B16.3
- Size 1:
- 1.25
- Size 2:
- 1
- Size 3:
- 0.75
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Pipe Fittings
- Product Subgroup:
- Tees
- Product Type:
- Tee
- Product Finish:
- Galvanized
- Product Material:
- Malleable Iron
- Product Weight:
- 0.92 lbs
ASC Engineered Solutions 311043608 – Frequently Asked Questions
1) What are the three port sizes on the ASC Engineered Solutions galvanized malleable iron reducing tee, model 311043608?
It's a 1-1/4 x 1 x 3/4 inch reducing tee. The run is 1-1/4 inch, the opposite run end is 1 inch, and the branch outlet is 3/4 inch. All three openings are female pipe thread (FPT), so it drops straight onto male-threaded pipe or nipples of those sizes.
2) Are the threads on this 1-1/4 x 1 x 3/4 malleable iron tee standard NPT?
Yes. The threads are cut to ASME B1.20.1, which is standard NPT taper pipe thread, and all three ports are female. It will mate with any NPT male thread in those sizes, sealed with tape or pipe dope in the normal way.
3) Is this galvanized tee approved for use on a fire sprinkler system?
It carries UL/FM approval, so it can be used on fire protection piping where a UL Listed, FM Approved malleable iron fitting is called for. It's standard (STD) pressure class per ASME B16.3.
4) Can I use a galvanized malleable iron tee on a potable water line, or should I use black iron?
Galvanized is the right choice for water service; black malleable iron is for gas and dry systems where corrosion isn't a concern. This tee is hot dip galvanized to ASTM A-153, which is the coating spec for iron hardware, over an ASTM A-197 malleable iron body. For wet lines, sprinkler mains, and damp mechanical rooms, galvanized is what you want. Note it is not a lead-free certified brass or copper fitting, so check your local requirement for the specific service before using it on drinking water.
5) Will a 1-1/4 x 1 x 3/4 reducing tee let me branch off a 1-1/4 inch main without extra bushings?
That's the point of it. Instead of running a 1-1/4 straight tee and then bushing down twice, this fitting reduces in one piece: 1-1/4 in on the run, 1 inch out the other end of the run, and 3/4 inch on the branch. Fewer joints means fewer leak paths. Orientation matters when you sweat the layout, so confirm which leg needs the 1 inch and which needs the 3/4 before you thread it up.
6) Does this ASC tee meet ASME B16.3 dimensional standards for interchangeability with other brands?
It's built to ASME B16.3 for both dimensions and pressure class, so center-to-end lengths and thread engagement match any other B16.3 standard-class malleable iron tee in the same sizes. You can mix it with existing galvanized malleable fittings on a run without layout changes.
7) How much does this 1-1/4 inch galvanized malleable iron tee weigh?
0.92 lbs each. Useful when you're calculating hanger spacing and support loads on a threaded run, or figuring freight on a bulk fitting order for a build-out.
8) Is this fitting suitable for compressed air or steam, or water only?
Standard class malleable iron to ASME B16.3 with NPT threads is a general purpose threaded fitting used across water, air, gas, and low pressure steam service. The rating that governs your application is the B16.3 standard class pressure rating at your service temperature, so size the system to that. The galvanized coating specifically suits wet and humid service.
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ASC Engineered Solutions 311043608 come with a warranty?
Absolutely. The ASC Engineered Solutions 311043608 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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