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11/4X1X1 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:
- 1
- 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:
- 1.11 lbs
ASC Engineered Solutions 310043401 – Frequently Asked Questions
1) What sizes are the three openings on the ASC Engineered Solutions 1-1/4 x 1 x 1 black malleable iron tee?
The run is 1-1/4 inch on one end and 1 inch on the other, with a 1 inch branch outlet. That makes it a reducing tee: it carries a 1-1/4 inch line through while dropping a 1 inch branch, and it also steps the run down to 1 inch on the far side. If you need the full 1-1/4 inch to continue past the fitting, this is not the tee for that run.
2) Are the ends on this 1-1/4 x 1 x 1 black iron tee threaded, and what thread do they take?
All three openings are female pipe thread (FPT), cut to ASME B1.20.1, which is standard NPT tapered pipe thread. It mates with any male-threaded black steel or malleable iron nipple or pipe of the matching size, sealed with pipe dope or PTFE tape. Nothing gets soldered, grooved, or pressed here, it is a thread-on fitting on all three ports.
3) Can I use a black malleable iron tee on a fire sprinkler line?
This one is UL/FM approved, so it is acceptable for fire protection piping where the authority having jurisdiction requires listed fittings. It is a Class 150 standard pattern fitting to ASME B16.3, threaded NPT throughout. Black malleable iron is the usual choice for wet sprinkler branch lines and for black steel pipe generally, not for potable water.
4) Will this black iron tee work for potable water?
No. The fitting is black malleable iron with a plain black finish and no protective coating, so it corrodes in potable water service and is not a lead-free water fitting. Use it on black steel pipe for gas, compressed air, and closed or fire protection systems. For domestic water you want a galvanized or brass or copper fitting instead.
5) Is this a standard or extra heavy malleable iron tee?
Standard pattern (STD), which is the Class 150 wall in ASME B16.3. If your spec calls out Class 300 extra heavy malleable iron for a higher working pressure, this fitting does not meet it, you need the 300 pattern instead. For ordinary black steel gas, air, and wet sprinkler branch work, standard is what gets specified.
6) Does this ASC tee meet ASME B16.3 and what iron grade is it?
Dimensions and pressure rating both follow ASME B16.3, and the casting is ASTM A197 malleable iron, which is the grade B16.3 fittings are normally produced to. Threads are ASME B1.20.1. Those three callouts are what a plan reviewer or MRO spec sheet is usually asking for on a threaded black iron fitting.
7) What part number do I order for the ASC black malleable iron 1-1/4 x 1 x 1 tee?
Manufacturer part number 310043401 from ASC Engineered Solutions. That is the single orderable configuration, black finish, standard pattern, FPT on all three ports, so there is no finish or pattern option to specify when you order it.
How fast can I get the ASC Engineered Solutions 310043401 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 310043401 come with a warranty?
Absolutely. The ASC Engineered Solutions 310043401 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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