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11/4X1X3/4 BLK 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
- 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:
- Black
- Product Material:
- Malleable Iron
- Product Weight:
- 0.87 lbs
ASC Engineered Solutions 310043609 – Frequently Asked Questions
1) What are the three port sizes on the ASC Engineered Solutions black malleable iron reducing tee, model 310043609?
It's a reducing tee with 1-1/4 inch, 1 inch, and 3/4 inch openings. All three ends are female pipe thread (FPT), so it threads onto male pipe or male-threaded nipples at every port. The run and branch assignment follows the standard 1-1/4 x 1 x 3/4 order, which is run x run x branch.
2) Can I use a black malleable iron tee on a potable water line?
No. Black malleable iron is for gas, air, steam, and other non-potable service. Black fittings have no corrosion-resistant coating and will rust in water service, so use galvanized or copper/CPVC for potable water. For natural gas or propane piping, black iron like this 1-1/4 x 1 x 3/4 tee is the usual choice.
3) Is this ASC tee acceptable for a fire sprinkler system?
It carries UL/FM approval, so it can be used where a listed fitting is required, including fire protection piping. It's a standard (STD) class malleable iron fitting pressure rated to ASME B16.3. Confirm the size and class against your approved sprinkler submittal.
4) I need a 1-1/4 inch run with a 3/4 branch but both run ends the same size. Is this the right tee?
No. This one reduces on the run as well as the branch: 1-1/4 by 1 by 3/4. For a full 1-1/4 inch run with only the branch reduced, order a 1-1/4 x 1-1/4 x 3/4 black malleable tee instead. Using this fitting would force a bushing or extra reducer on the 1 inch end.
5) Is this a Class 150 standard fitting or an extra-heavy 300 tee?
Standard class. The strength rating is STD, with pressure and dimensions both governed by ASME B16.3. If your drawing calls for extra-heavy (Class 300) malleable iron, this isn't the fitting, and the face-to-center dimensions differ as well.
6) Will this tee interchange with another brand's 1-1/4 x 1 x 3/4 black malleable tee already in my line?
Yes, dimensionally. Both the laying dimensions (ASME B16.3) and the threads (ASME B1.20.1) are standardized, so a Class 150 black malleable reducing tee of the same size from any conforming maker occupies the same space and threads the same. You won't have to re-cut pipe to swap it in.
7) Do I need anything else to install this ASC black malleable tee?
The tee ships as a bare fitting. You'll need pipe joint compound rated for your service (a gas-rated dope or PTFE tape for fuel gas) and the correct male-threaded pipe or nipples at 1-1/4, 1, and 3/4 inch. No gaskets or unions come with it, so plan a union nearby if the assembly needs to come apart later.
8) What grade of iron is this fitting cast from?
Malleable iron to ASTM A-197, the material spec for cupola malleable iron fittings. That's what gives it ductility rather than the brittleness of gray cast iron, which is why it tolerates thread engagement and vibration in gas and sprinkler piping.
9) How much does this 1-1/4 x 1 x 3/4 black tee weigh for shipping or hanger load calculations?
0.87 lbs each. Useful if you're totaling fitting weight on a run to size hangers or supports.
How fast can I get the ASC Engineered Solutions 310043609 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 ASC Engineered Solutions 310043609 come with a warranty?
Absolutely. The ASC Engineered Solutions 310043609 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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