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1X3/4 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
- 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 lbs
ASC Engineered Solutions 310504600 – Frequently Asked Questions
1) Is the ASC 1 x 3/4 black malleable iron 90 elbow a reducing fitting, and which end is which?
It's a reducing 90 degree elbow: one end takes 1 inch pipe, the other 3/4 inch. Both ends are female pipe thread (FPT), so it threads directly onto male pipe ends or nipples. Use it where a 1 inch run needs to turn and drop to 3/4 inch in a single fitting instead of an elbow plus a bushing.
2) What does XH mean on a malleable iron fitting, and when do I need it over standard?
XH is extra heavy, the 300 pound class of malleable iron fitting. It has thicker walls and a higher pressure rating than the standard (150 class) fitting of the same size, and the pressure rating follows ASME B16.3. Specify XH when the drawing calls for 300 class, on higher pressure gas or steam service, or where the line takes mechanical abuse. For ordinary low pressure work a standard black malleable elbow is the usual call.
3) Is this elbow UL listed and FM approved for a sprinkler line?
Yes, the fitting carries UL/FM recognition, which is what a fire protection inspector looks for on threaded malleable iron fittings in a sprinkler system. It's a black finish fitting, so it suits wet-pipe sprinkler and gas service rather than potable water.
4) Can I use a black malleable iron elbow on a potable water line?
No. Black malleable iron is for gas, air, steam, fire protection and other non-potable service. On domestic water it will rust and discolor the water; use galvanized, copper, brass or CPVC there instead. The black finish is a bare, uncoated iron surface, not a corrosion barrier.
5) Does this elbow meet the ASME B16.3 dimensions my spec calls out?
It is made to ASME B16.3 for dimensions and pressure ratings, and the iron itself is to ASTM A-197. That means center-to-end dimensions match any other B16.3 300 class reducing elbow of the same size, so it drops into a fabricated assembly without re-measuring the run.
6) Can I use this reducing elbow instead of a 1 inch elbow with a 1 x 3/4 bushing?
Yes, and it's the cleaner way to do it. A single reducing elbow gives you one joint to seal instead of two and keeps the turn compact where space is tight. The tradeoff is that the reduction happens at the fitting, so if you need the full 1 inch bore through the turn and reduce further downstream, use the straight 1 inch elbow and a separate reducer.
7) How do I order the right ASC reducing elbow, and how heavy is it?
The part number is 310504600 from ASC Engineered Solutions, the 1 x 3/4 extra heavy black malleable 90. It weighs 1 lb, so a case of them is easy to carry up a ladder and shipping weight on a small order stays low.
How fast can I get the ASC Engineered Solutions 310504600 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 310504600 come with a warranty?
Absolutely. The ASC Engineered Solutions 310504600 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 310504600?
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