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11/4X3/4 XH 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:
- 1.25
- Size 2:
- 0.75
- Strength:
- XH
- 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:
- 1.41 lbs
ASC Engineered Solutions 310505201 – Frequently Asked Questions
1) What sizes are the two ends on the ASC 1-1/4 x 3/4 black malleable iron 90 degree elbow?
It's a reducing 90, 1-1/4 inch on the large end and 3/4 inch on the small end. Both ends are female pipe thread (FPT), so it threads onto male-threaded pipe nipples on each side and turns the line 90 degrees while stepping the size down in one fitting instead of using an elbow plus a bushing.
2) What does XH mean on this malleable iron fitting, and when do I need it instead of standard weight?
XH is extra heavy, the 300 class pattern rather than the 150 class standard weight. Wall sections are thicker and the pressure rating is higher at a given size. Spec it where the drawing calls for extra heavy or 300 pound malleable, or where the service pressure exceeds what standard weight covers. Dimensions and pressure class both follow ASME B16.3. Physically it will still thread to the same NPT pipe as a standard weight fitting, so the choice is about rating, not fit.
3) Is this elbow UL Listed and FM Approved for fire protection piping?
Yes, the fitting carries UL/FM recognition, which is what an inspector looks for on sprinkler and fire main threaded fittings. Combined with the extra heavy rating and ASME B16.3 pressure class, it is the pattern normally specified for that service.
4) Can I use a black malleable iron elbow on a domestic water line?
No. Black malleable iron is uncoated and will rust in potable water service, which is why it is used for gas, fire protection, compressed air, steam and similar dry or non-potable lines. For water you want galvanized malleable, copper, or CPVC instead. The black finish here is the mill black coating, not a corrosion barrier for wet potable use.
5) What grade of iron is this reducing 90 made from?
The casting meets ASTM A-197, the specification for cupola malleable iron used in threaded pipe fittings. That is the material grade a mechanical spec normally calls out for malleable iron fittings, so it drops straight into a job written to A-197.
6) Do I need a bushing with this fitting to go from 1-1/4 down to 3/4?
No bushing needed. The reduction is built into the elbow itself, with a 1-1/4 inch female threaded end and a 3/4 inch female threaded end. That saves you a joint and about an inch of takeout compared to running a full size 90 and then a hex bushing, which matters in tight riser work.
7) What is the part number and weight on the ASC 1-1/4 x 3/4 extra heavy black 90 elbow?
Manufacturer part number 310505201, and the fitting weighs 1.41 lbs each. Useful if you are figuring hanger spacing or freight on a bulk order of reducing 90s.
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Does the ASC Engineered Solutions 310505201 come with a warranty?
Absolutely. The ASC Engineered Solutions 310505201 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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