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3/4X3/8X3/4 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:
- 0.75
- Size 2:
- 0.375
- Size 3:
- 0.75
- 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:
- 0.46 lbs
ASC Engineered Solutions 310039003 – Frequently Asked Questions
1) What size openings does the ASC 3/4 x 3/8 x 3/4 black malleable iron tee have?
It's a reducing tee with 3/4 inch run ends and a 3/8 inch branch. All three openings are female pipe thread (FPT), so the run carries 3/4 inch NPT pipe straight through and the 3/8 inch side outlet takes a smaller branch line, gauge, or drain tapping.
2) Will this black malleable iron tee thread onto standard NPT pipe?
Yes. The threads are cut to ASME B1.20.1, which is the NPT standard, so it mates with ordinary threaded black or galvanized steel pipe and NPT-threaded nipples. All three ports are female, so you thread pipe or nipples into the fitting rather than over it.
3) Can I use a black malleable iron tee on a potable water line?
No. Black malleable iron is for gas, air, oil, and non-potable service such as fire protection and low pressure steam. The black finish here is a plain uncoated iron surface, not a corrosion barrier, so it rusts in wet potable service. For domestic water, use brass, copper, or galvanized fittings instead.
4) Is this tee approved for fire sprinkler work?
It carries UL/FM recognition, which is what an inspector looks for on fire protection piping. It is a Class 150 standard pattern fitting rated per ASME B16.3, so confirm it against the pressure class called out on your sprinkler drawing.
5) What is the difference between a standard and an extra heavy malleable iron tee?
This one is the standard (STD) pattern, which is the Class 150 weight used for most threaded gas, air, and sprinkler piping. Extra heavy (Class 300) fittings have thicker walls and deeper thread engagement for higher working pressures. If your spec calls out Class 300, the standard pattern is not a substitute.
6) Does this reducing tee meet ASME B16.3 dimensions so it will drop into an existing threaded run?
Yes. Both the dimensions and the pressure rating follow ASME B16.3, so the center-to-end lengths match any other B16.3 malleable iron tee of the same sizes. Swapping it in for a worn 3/4 x 3/8 x 3/4 tee from another maker will not change your takeout.
7) What material grade is the ASC 310039003 tee cast from?
Malleable iron produced to ASTM A-197, the standard grade for threaded pipe fittings. Malleable iron takes thread cutting and wrench torque without the brittleness of gray cast iron, which is why it is specified for screwed gas and sprinkler piping. The fitting weighs 0.46 lbs.
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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 310039003 come with a warranty?
Absolutely. The ASC Engineered Solutions 310039003 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ASC Engineered Solutions 310039003?
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