Lyall Steel to PE Transition Fittings

Steel to PE Pipe Transition Fittings

Two Proven Designs for a Seal You Can Trust

Safe, economical, easy to install—Lyall factory-assembled steel to PE pipe transition fittings are the dynamic choice for nearly any transition configuration.

  • Over 4 million Units in Use
  • Approved by Most Major Natural Gas, Propane, and Industrial Fluids Companies

Choose from Four Assemblages: 

  • Threaded End
  • Victaulic Groove
  • Weld End, Beveled
  • Flanged, Flat or Raised Face

Steel End Options

  • SCH 40 (standard) or SCH 80
  • Fusion Bonded Epoxy, Bare Steel (Black), or Primer
  • Internal Fusion Bonded Epoxy (Victaulic groove and threaded O.D. seal models only)

PE Pipe End Connections/Options

  • Squared, ready for fusion
  • Socket Fusion Fittings
  • LYCOFIT® Mechanical Couplings (PE pipe sizes up to 2 IPS)
  • Wide Selection of Medium and High Density PE
  • Commercial/Industrial Grade PE 4710

 Choose from Two Distinct Sealing Methods:

For a permanent, leak-proof seal.

O.D. Seal Transition “Wayne Design”

od seal transition

O-rings sit in a grooved sleeve that encases the PE pipe’s outside wall. Within the PE pipe, a steel retainer pushes outward, compressing the pipe and creating a permanent leak-proof seal with a tensile strength far greater than the PE pipe itself.

Time-Tested Quality: Lyall O.D. Seal Transitions have been manufactured for over 30 years

I.D. Seal Transition “Lyco Design”

id seal transition

A smooth sleeve encases the PE pipe, while a steel barbed spigot within the PE pipe pushes outward, hooking the pipe and creating a leak-proof seal and tensile strength that is far greater than the PE pipe itself.

Time-Tested Quality: Lyall I.D. Seal Transitions have been manufactured for over 35 years.



Key Features

  • Meets or exceeds requirements for ASTM D2513 category 1, ASME B31.8, 49 CFR 192
  • Listed with IAPMO/UPC
  • Certified to CSA B137.4
  • Available with either primer coating or corrosion and damage-resistant fusion bonded epoxy
  • All welded joints are 100% pressure-tested


Steel to PE Transition Fittings Products



Threaded Steel End – Standard Sizes

Threaded Steel End - Standard Sizes

Steel Pipe SizePE Pipe SizeWall ThicknessLength (Steel x PE)
1/2″ NPT1/2 CTS.090/SDR74″ X 12″
1/2″ NPT1/2 IPSSDR9.34″ X 12″
3/4″ NPT1/2 CTS.090/SDR74″ X 12″
3/4″ NPT1/2 IPSSDR9.34″ X 12″
3/4″ NPT3/4 IPSSDR114″ X 12″
1″ NPT1 CTS0.094″ X 12″
1″ NPT1 CTS.099-.102/SDR11.54″ X 12″
1″ NPT1 IPSSDR114″ X 12″
1-1/4″ NPT1-1/4 IPSSDR10/114″ X 12″
1-1/2″ NPT1-1/2 IPSSDR114″ X 12″
2″ NPT2 IPSSDR116″ X 12″
3″ NPT3 IPSSDR116″ x 14″
3″ NPT3 IPSSDR11.56″ x 14″
4″ NPT4 IPSSDR116″ x 18″
4″ NPT4 IPSSDR11.56″ x 18″

 Beveled Steel End for Welding – Standard Sizes

Beveled Steel End for Welding

Steel Pipe SizePE Pipe SizeWall ThicknessLength (ST X PE)
1/2″ NPS1/2 CTS.090/SDR712″ x 12″
1/2″ NPS1/2 IPSSDR9.312″ x 12″
3/4″ NPS1/2 CTS.090/SDR712″ x 12″
3/4″ NPS1/2 IPSSDR9.312″ x 12″
3/4″ NPS3/4 IPSSDR1112″ x 12″
1″ NPS1 CTS0.0912″ x 12″
1″ NPS1 CTS.099-.102/SDR11.512″ x 12″
1″ NPS1 IPSSDR1112″ x 12″
1-1/4″ NPS1-1/4 IPSSDR10/1112″ x 12″
1-1/2″ NPS1-1/2 IPSSDR1112″ x 12″
2″ NPS2 IPSSDR1114″ x 14″
3″ NPS3 IPSSDR1114″ x 14″
3″ NPS3 IPSSDR11.514″ x 14″
4″ NPS4 IPSSDR1116″ x 18″
4″ NPS4 IPSSDR11.516″ x 18″
6″ NPS6 IPSSDR11.518″ x 18″
6″ NPS6 IPSSDR13.518″ x 18″
8″ NPS8 IPSSDR1118″ x 18″
8″ NPS8 IPSSDR11.518″ x 18″
8″ NPS8 IPSSDR13.518″ x 18″

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