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4X3 GALV MI REDUCER
Manufacturer Resources
Product Specs
- Dimensions Specification:
- ASME B16.3
- End Conn Size 1:
- FPT
- End Conn Size 2:
- FPT
- Finish Specification:
- ASTM A-153
- Material Specification:
- ASTM A-197
- Pressure Rating Specification:
- ASME B16.3
- Size 1:
- 4
- Size 2:
- 3
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Pipe Fittings
- Product Subgroup:
- Reducers
- Product Type:
- Reducer
- Product Finish:
- Galvanized
- Product Material:
- Malleable Iron
- Product Weight:
- 6.63 lbs
ASC Engineered Solutions 311092605 – Frequently Asked Questions
1) Does the ASC 4 x 3 galvanized malleable iron reducer have female threads on both ends?
Both ends are FPT, so this is a female-female bell reducer: the 4 inch end takes 4 inch male pipe thread and the 3 inch end takes 3 inch male pipe thread. Threads are cut to ASME B1.20.1 (NPT), so it mates with standard threaded steel or iron pipe and standard NPT nipples. If you need a male end on the large side, you want a bushing or a swage nipple instead.
2) Is this 4x3 malleable iron reducer approved for fire sprinkler piping?
It carries UL/FM approval, which is what an inspector looks for on wet and dry sprinkler mains. It is standard weight (STD) galvanized malleable iron, which is the usual choice for dry and pre-action systems where corrosion inside the pipe is the concern. Threads follow ASME B1.20.1 and dimensions follow ASME B16.3.
3) Can I use this reducer to step 4 inch pipe down to 3 inch without a bushing?
Yes, that is exactly the job. It is a one-piece bell reducer with a 4 inch female threaded end and a 3 inch female threaded end, so it replaces the nipple-plus-bushing combination and keeps the run shorter. No separate bushing needed.
4) What is the pressure rating class on this ASC galvanized reducer?
The reducer is standard weight, and its pressure rating is per ASME B16.3, the standard that assigns malleable iron threaded fittings their Class 150 standard and Class 300 extra-heavy ratings by size. Standard weight is the Class 150 line. Match it to the pressure class called out on your piping drawing before you set it.
5) Is the galvanizing on this reducer hot dip, and will it hold up outdoors?
The galvanized finish is applied to ASTM A-153, which is the hot dip zinc coating specification for iron and steel hardware, not an electroplate. That is the coating spec normally required for exterior and damp service and for dry sprinkler systems. The body itself is malleable iron to ASTM A-197.
6) Will this galvanized reducer work on black iron pipe, or do I need black fittings?
It threads onto black steel pipe fine, since the thread form is standard NPT to ASME B1.20.1 and dimensions follow ASME B16.3. The question is the system: mixing galvanized fittings into a black iron run is common on sprinkler work but some mechanical specs require the fittings match the pipe coating. Check the spec section before you mix them.
7) How much does the 4x3 malleable iron reducer weigh for overhead hanger sizing?
6.63 lbs for the fitting alone. Add that to the filled weight of the adjacent pipe when you size hangers and seismic bracing around the transition, since the fitting plus the threaded joints concentrate load at one point.
8) What part number do I order for the ASC 4x3 galvanized reducer?
The manufacturer part number is 311092605 from ASC Engineered Solutions. That single number covers the 4 x 3 galvanized malleable iron standard weight reducer with FPT ends.
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Does the ASC Engineered Solutions 311092605 come with a warranty?
Absolutely. The ASC Engineered Solutions 311092605 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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