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4X4X3 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:
- 4
- Size 2:
- 4
- Size 3:
- 3
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Tees
- Product Type:
- Tee
- Product Finish:
- Black
- Product Material:
- Malleable Iron
- Product Weight:
- 11.02 lbs
ASC Engineered Solutions 310056601 – Frequently Asked Questions
1) What size openings does the ASC 4x4x3 black malleable iron tee have?
It's a reducing tee: the two run ends are 4 inch and the branch outlet is 3 inch. All three openings are female pipe thread (FPT), so pipe or nipples thread directly in. Use it where you're running 4 inch line and need to take a 3 inch branch off the side.
2) Are the threads on this 4x4x3 malleable iron tee NPT?
Yes. The threads are cut to ASME B1.20.1, which is the standard for NPT taper pipe threads, and all three ports are female. Standard black iron nipples and threaded pipe made to the same spec will mate with it. Thread sealant or PTFE tape is still required on the joint and is not supplied with the fitting.
3) Can I use this black malleable iron tee on a fire sprinkler system?
It's UL/FM recognized, which is the listing fire protection contractors and AHJs look for on threaded fittings in sprinkler piping. It's standard (STD) pattern malleable iron with pressure ratings per ASME B16.3. Confirm the rating matches the working pressure your sprinkler design calls out before installing.
4) Will a black malleable iron tee work on a domestic water line?
No, not for potable water. Black malleable iron is uncoated and will rust in a wet potable line. This fitting is intended for black iron service such as natural gas, fuel oil, compressed air, and fire sprinkler piping. For potable water in a threaded system you want galvanized malleable iron or a different material entirely.
5) Is this tee the right pattern to match my existing black iron fittings dimensionally?
Yes, if the rest of your system is standard threaded malleable iron. The tee is made to ASME B16.3, which fixes center-to-end dimensions for malleable iron threaded fittings, so it drops into a run laid out with any other B16.3 fitting of the same size and class. The casting itself is ASTM A-197 malleable iron.
6) What does the STD marking mean on this malleable iron tee, and when would I need extra heavy instead?
STD means standard pattern, the Class 150 style malleable iron fitting covered by ASME B16.3 for ordinary threaded pipe work. Extra heavy (Class 300) fittings have thicker walls and a higher pressure rating and are specified on higher pressure steam or process lines. If your drawing calls for 300 lb fittings, this standard pattern tee is not the right part.
7) Do I need a bushing to run 3 inch off a 4 inch tee?
No. The branch outlet on this tee is already 3 inch FPT, so you thread 3 inch pipe or a 3 inch nipple straight into it. Using a full 4x4x3 reducing tee instead of a 4x4x4 tee with a bushing gives you one less joint to seal and keeps the branch flow area clean.
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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 310056601 come with a warranty?
Absolutely. The ASC Engineered Solutions 310056601 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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