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Anvil
Anvil 0320200249 3 in Malleable Iron Merchant Coupling FNPT Class 150
A 3-inch malleable iron merchant coupling with FNPT threads, rated Class 150 for 300 psi at 150 °F and 150 psi saturated steam at 350 °F
- TypeDrain Components
- 3 in FNPT coupling fits 3 in pipe
- Class 150 rating handles 300 psi at 150 °F
- Malleable iron body resists corrosion and impact
- UL and FM approved to ASME B 16.3
- Operates from -20 °F to 350 °F for steam and water
Anvil 3 in Malleable Iron Coupling
This Anvil merchant coupling connects 3 inch pipes in plumbing and drainage systems. The fitting is manufactured from black malleable iron and uses FNPT threaded ends for a secure joint. It is rated Class 150 for standard pressure service.
Class 150 pressure rating and standards compliance
The coupling meets ASME B 16.3 dimensional requirements and carries UL and FM approvals. It handles up to 300 psi at 150 degrees F and 150 psi saturated steam at 350 degrees F across a temperature range of -20 to 350 degrees F. These ratings define the safe operating envelope for water, air or steam lines.
Installers needing a 3 inch FNPT malleable iron
The fitting suits contractors joining 3 inch threaded pipe in commercial or residential drainage, water supply or low-pressure steam applications. It does not suit systems requiring welded, flanged or grooved connections, nor installations that exceed the stated pressure or temperature limits. Buyers needing different pipe sizes or connection types should select an alternative fitting.
Highlights
- 3 in FNPT coupling fits 3 in pipe
- Class 150 rating handles 300 psi at 150 °F
- Malleable iron body resists corrosion and impact
- UL and FM approved to ASME B 16.3
- Operates from -20 °F to 350 °F for steam and water
Specifications
| Type | Drain Components |
|---|---|
| Brand | Anvil |
| Model | 0320200249 |
Questions about this item
Will the malleable iron coupling need periodic replacement due to corrosion or wear under normal plumbing conditions?
Malleable iron resists mechanical wear well; corrosion depends on water chemistry and whether the black finish is painted or coated after installation, so inspection intervals vary by system.
What pressure or temperature limit will be reached first during continuous hot-water circulation at the rated 300 psi?
The saturated-steam rating of 150 psi at 350 °F is the lower ceiling; sustained operation above that pressure-temperature combination exceeds the Class 150 design envelope.
Does the coupling generate noticeable heat or noise when steam at 150 psi flows through it all day?
The fitting itself has no moving parts and produces no noise; its surface temperature will approach the steam temperature of 350 °F, so external insulation is advisable for personnel safety.
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