4 in. NPT Threaded Union (Brass Seat) - 300# Black Malleable Iron Pipe Fitting - UL/FM

Size: 4"
UL Listed, FM Approved
Class: 300#

Black pipe fittings (black malleable iron fittings) are used to make connections to black iron pipe. Black iron pipe is used to transport natural and propane gas in residential applications. Black iron pipe is also most often use in fire sprinkler systems due to its high heat resistance and for water supply lines due to its resistance to water damage. Black fittings derive their name from the black oxide scale covering the surface.

• Class 150 pipe fittings are UL Listed
• Class 300 pipe fittings are UL Listed & FM Approved
• Hot-dipped galvanized fittings are certified to; NSF/ANSI 61-4 and California AB1953 Lead Free
• Malleable castings conform to ASTM A197, ASME B16.3, ASME B16.14 and ASME B16.39
• Hot-dipped galvanized fittings conform to ASTM A153
• NPT threads on all pipe fittings conform to ASME B1.20.1
• Independent lab verification that pipe fittings meet applicable chemical & physical properties
• Manufacturing facilities are ISO 9001:2008 and ISO 14001
• Pipe fittings are 100% air tested
• Canadian Registration Numbers (CRN) available

• Differences & Best Use: Black Pipe & Galvanized Pipe Fittings
• NPT, NPTF & NPS Connections