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1X3/4 GALV MI HEX BUSHING
Manufacturer Resources
Product Specs
- Dimensions Specification:
- ASME B16.3
- End Conn Size 1:
- MPT
- End Conn Size 2:
- FPT
- Finish Specification:
- ASTM A-153
- Material Specification:
- ASTM A-197
- Pressure Rating Specification:
- ASME B16.3
- Size 1:
- 1
- Size 2:
- 0.75
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Pipe Fittings
- Product Subgroup:
- Bushings
- Product Type:
- Bushing
- Product Finish:
- Galvanized
- Product Material:
- Malleable Iron
- Product Weight:
- 0.17 lbs
ASC Engineered Solutions 319906640 – Frequently Asked Questions
1) Which end of a 1 x 3/4 galvanized hex bushing is the male thread and which is the female?
On this ASC Engineered Solutions hex bushing, the 1 inch end is the male pipe thread (MPT) and the 3/4 inch end is female pipe thread (FPT). So it threads into a 1 inch female port and gives you a 3/4 inch female outlet. Threads are NPT per ASME B1.20.1, so they mate with standard tapered pipe thread.
2) Can I use a malleable iron hex bushing on a wet sprinkler line?
This 1 x 3/4 galvanized malleable iron hex bushing carries a UL/FM listing, which is what a fire protection inspector looks for on a sprinkler fitting. The galvanized coating (hot dip per ASTM A-153) is also the usual choice for wet pipe systems where bare iron would rust. Confirm your system drawing allows a bushing at that location, since some fire codes restrict reducing bushings in favor of reducing couplings.
3) Is this bushing standard weight or extra heavy, and what pressure class does that mean?
It is a standard weight (STD) fitting, built and pressure rated to ASME B16.3, the standard that governs threaded malleable iron fittings. In B16.3 terms that is the Class 150 galvanized line rather than the Class 300 extra heavy line. If your spec calls out Class 300 or extra heavy, this is not the part.
4) Will a galvanized malleable iron bushing work with black iron fittings, or do I have to stay all galvanized?
Mechanically it threads right in, since both are NPT to ASME B1.20.1 and dimensionally to ASME B16.3. The reason to match is service: galvanized is used on water and wet fire protection lines, black iron on gas and dry service. Mixing galvanized into a gas line is usually rejected because zinc flakes can foul controls, and many inspectors will not pass it. Keep the material consistent with what the rest of the system is specified as.
5) Does this ASC bushing meet a spec callout for ASTM A197 malleable iron fittings?
Yes. The casting is made to ASTM A-197 malleable iron, the galvanizing is ASTM A-153, threads are ASME B1.20.1, and dimensions and pressure rating are ASME B16.3. That is the full spec stack a submittal for threaded galvanized malleable iron fittings normally asks for.
6) What part number do I order for the ASC 1 x 3/4 galvanized hex bushing?
Order ASC Engineered Solutions part 319906640. That is the 1 inch MPT x 3/4 inch FPT galvanized malleable iron hex bushing, standard weight. Each piece weighs about 0.17 lbs, which is useful if you are ordering a carton count for a fitting stock order.
7) Do I need thread sealant with this bushing or is it dry fit?
It needs sealant. The threads are tapered NPT to ASME B1.20.1, and tapered pipe thread relies on pipe dope or PTFE tape at the joint to seal. Nothing is supplied with the bushing, so order sealant separately and pick one rated for the service, water versus fire protection versus compressed air.
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Does the ASC Engineered Solutions 319906640 come with a warranty?
Absolutely. The ASC Engineered Solutions 319906640 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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