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4 BLK MI 90 ELL
Manufacturer Resources
Product Specs
- Dimensions Specification:
- ASME B16.3
- End Conn Size 1:
- FPT
- End Conn Size 2:
- FPT
- Material Specification:
- ASTM A-197
- Pressure Rating Specification:
- ASME B16.3
- Size 1:
- 4
- Size 2:
- 4
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Pipe Fittings
- Product Subgroup:
- Elbows
- Product Type:
- 90° Elbow
- Product Finish:
- Black
- Product Material:
- Malleable Iron
- Product Weight:
- 8.96 lbs
ASC Engineered Solutions 310002605 – Frequently Asked Questions
1) What thread type does the ASC 4 inch black malleable iron 90 degree elbow use on both ends?
Both openings are 4 inch FPT, so it threads onto male-threaded (MPT) pipe ends on each side. Threads are cut to ASME B1.20.1, the standard NPT taper thread spec, so it mates with ordinary 4 inch black steel pipe nipples and threaded pipe without an adapter.
2) Can I use a black malleable iron 90 elbow on a potable water line?
No. Black malleable iron is for gas, fire protection, air, and low pressure steam or non-potable service. It has no protective coating, so potable water will rust it from the inside. For water lines use a galvanized malleable fitting or copper/CPVC instead. Black fittings are also the standard choice for natural gas and propane piping.
3) What is the difference between a standard and an extra heavy 4 inch malleable 90, and which do I need?
This ASC elbow is standard weight (STD), Class 150 under ASME B16.3, which covers the large majority of threaded black iron work: gas distribution, sprinkler mains, compressed air. Extra heavy (Class 300) has thicker walls and a higher pressure rating and is specified when the drawing calls for it or the working pressure exceeds the Class 150 limit. Match whatever the spec on the job says, since the two are not interchangeable on a pressure test.
4) How much does a 4 inch black iron 90 elbow weigh for overhead hanger spacing?
The fitting itself weighs 8.96 lbs. At 4 inch, that is a two-hand lift at height, so plan a hanger close to the elbow rather than letting the fitting hang mid-span between supports.
5) Is this a reducing elbow or same size on both ends?
Straight 4 inch by 4 inch, no reduction. Both ends are the same size and both are female threaded, so it turns a 4 inch run 90 degrees without changing pipe size. If you need to drop to a smaller size at the turn you want a reducing 90 or a bushing at the outlet.
6) Do I need thread sealant with this fitting, or does it seal on its own?
The NPT taper threads to ASME B1.20.1 seal metal to metal but still need a sealant to be leak tight. Use PTFE tape or a pipe joint compound rated for the service, and on gas work use a sealant listed for gas. Nothing is supplied with the elbow.
7) What grade of iron is this ASC 4 inch elbow made from?
Cast malleable iron produced to ASTM A-197, the grade specification for cupola malleable iron pipe fittings. Malleable iron is used over gray cast iron on threaded fittings because it tolerates the thread stress and the impact of being wrenched up without cracking.
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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 310002605 come with a warranty?
Absolutely. The ASC Engineered Solutions 310002605 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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