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Black steel pipe nipple with threaded ends

Legend Valve

Legend Valve 355-226E 4" x 4" Schedule 40 Black Nipple

SKU CH-FQEX-PWTVW

A 4-inch Schedule 40 black nipple connects two female-threaded fittings in plumbing systems

  • Schedule 40 rating handles high-pressure systems
  • 4-inch diameter fits standard large-bore piping
  • Black steel construction resists mechanical wear
  • Legend Valve brand ensures consistent thread quality
  • Prop 65 notice discloses regulated chemical content

Product identity

Legend Valve 355-226E is a 4 inch by 4 inch Schedule 40 black nipple designed for plumbing installations. It serves professionals and DIY users who need a short, threaded pipe section to join two female fittings in a black iron system. The fitting is supplied new and carries California Proposition 65 warnings for cancer and reproductive harm.

Critical specification

The single specification that decides fit is the Schedule 40 wall thickness combined with the 4 inch nominal diameter. Only components matching this schedule and size will thread correctly and maintain the pressure rating of the system. Buyers who need a different wall thickness or a longer length cannot use this nipple.

Installation and common issues

The nipple installs by threading each end into compatible female fittings using appropriate pipe sealant or tape. Over-tightening can crack the fitting or strip the threads, while under-tightening leads to leaks. The black finish offers no corrosion protection, so the joint may rust if exposed to moisture without additional coating.

Highlights

  • Schedule 40 rating handles high-pressure systems
  • 4-inch diameter fits standard large-bore piping
  • Black steel construction resists mechanical wear
  • Legend Valve brand ensures consistent thread quality
  • Prop 65 notice discloses regulated chemical content

Specifications

BrandLEGEND VALVE

Questions about this item

What does the Schedule 40 rating tell me about this 4" black nipple once it is installed?

Schedule 40 defines the wall thickness and pressure rating for the 4" diameter, so the nipple meets standard industrial pipe dimensions for water, gas or oil lines.

Which threading standard applies to the ends of this 4" black nipple?

The nipple uses NPT taper threads on both ends, the common standard for Schedule 40 black steel pipe fittings in North America.

What clearance and support does a 4" Schedule 40 black nipple need when mounted in a piping run?

Allow enough straight run for the 4" nominal bore plus thread engagement on each end, and support the pipe at intervals rated for Schedule 40 steel to prevent sagging.

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