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Stainless steel pipe coupling with threaded ends

Legend Valve

Legend Valve 416-089 2-1/2 inch 316 Stainless Steel Coupling equipment

SKU CH-2A25-4X0TE

Connects 2-1/2 inch FNPT pipes using corrosion-resistant 316 stainless steel construction

  • 316 stainless steel resists corrosion in aggressive fluids
  • FNPT x FNPT threads simplify pipe connections
  • 2-1/2 inch bore suits high-flow industrial systems
  • Legend Valve brand backs consistent manufacturing quality
  • New condition ensures full material integrity from first use

Industrial Coupling Application

The Legend Valve 416-089 is a 2-1/2 inch coupling manufactured from 316 stainless steel for industrial plumbing systems. It connects two female NPT threaded pipes in fluid transfer applications where corrosion resistance is required. The fitting suits installers working with aggressive media or environments that demand austenitic alloy durability. Buyers needing a different alloy grade or a reducing configuration cannot use this specific coupling.

Sustained Service Behaviour

The 316 stainless steel construction resists pitting and crevice corrosion during continuous exposure to chlorides and acidic condensates. Mechanical integrity is maintained across repeated thermal cycles without the stress relaxation common in softer alloys. Thread engagement remains leak-tight under constant vibration because the material work-hardens rather than galling. The coupling carries a California Proposition 65 warning for chemicals linked to cancer and reproductive harm.

Installation Practicalities

Thread sealant or PTFE tape must be applied to the FNPT faces before assembly to prevent spiral leak paths. Over-torquing with oversized pipe wrenches distorts the thin-wall hex flats, causing weep paths that cannot be resealed. The 316 alloy work-hardens rapidly, so disassembly after long service often requires heat or cutting. Installers should verify thread gauge compatibility before committing the joint.

Highlights

  • 316 stainless steel resists corrosion in aggressive fluids
  • FNPT x FNPT threads simplify pipe connections
  • 2-1/2 inch bore suits high-flow industrial systems
  • Legend Valve brand backs consistent manufacturing quality
  • New condition ensures full material integrity from first use

Specifications

BrandLEGEND VALVE

Questions about this item

Does the 316 stainless steel coupling generate noise, heat or draw power when installed in a line that runs all day?

No, the 316 stainless steel coupling is a passive fitting with no moving parts, so it produces no noise, no heat and draws no power during continuous operation.

What piping or thread standard must already be in place for the FNPT x FNPT connection to seal properly?

Both mating pipes need female NPT threads cut to the same 2-1/2 inch nominal size so the coupling can thread on and seal without adapters.

Will the 316 stainless steel coupling join older galvanised or brass pipe without accelerated corrosion?

The 316 stainless steel resists galvanic corrosion better than plain steel, but direct contact with dissimilar metals in water can still drive corrosion over time; dielectric unions are recommended for mixed-metal systems.

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