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 Size PE Pipe Size Wall Thickness Length (Steel x PE)
1/2″ NPT 1/2 CTS .090/SDR7 4″ X 12″
1/2″ NPT 1/2 IPS SDR9.3 4″ X 12″
3/4″ NPT 1/2 CTS .090/SDR7 4″ X 12″
3/4″ NPT 1/2 IPS SDR9.3 4″ X 12″
3/4″ NPT 3/4 IPS SDR11 4″ X 12″
1″ NPT 1 CTS 0.09 4″ X 12″
1″ NPT 1 CTS .099-.102/SDR11.5 4″ X 12″
1″ NPT 1 IPS SDR11 4″ X 12″
1-1/4″ NPT 1-1/4 IPS SDR10/11 4″ X 12″
1-1/2″ NPT 1-1/2 IPS SDR11 4″ X 12″
2″ NPT 2 IPS SDR11 6″ X 12″
3″ NPT 3 IPS SDR11 6″ x 14″
3″ NPT 3 IPS SDR11.5 6″ x 14″
4″ NPT 4 IPS SDR11 6″ x 18″
4″ NPT 4 IPS SDR11.5 6″ x 18″

 Beveled Steel End for Welding – Standard Sizes

Beveled Steel End for Welding

Steel Pipe Size PE Pipe Size Wall Thickness Length (ST X PE)
1/2″ NPS 1/2 CTS .090/SDR7 12″ x 12″
1/2″ NPS 1/2 IPS SDR9.3 12″ x 12″
3/4″ NPS 1/2 CTS .090/SDR7 12″ x 12″
3/4″ NPS 1/2 IPS SDR9.3 12″ x 12″
3/4″ NPS 3/4 IPS SDR11 12″ x 12″
1″ NPS 1 CTS 0.09 12″ x 12″
1″ NPS 1 CTS .099-.102/SDR11.5 12″ x 12″
1″ NPS 1 IPS SDR11 12″ x 12″
1-1/4″ NPS 1-1/4 IPS SDR10/11 12″ x 12″
1-1/2″ NPS 1-1/2 IPS SDR11 12″ x 12″
2″ NPS 2 IPS SDR11 14″ x 14″
3″ NPS 3 IPS SDR11 14″ x 14″
3″ NPS 3 IPS SDR11.5 14″ x 14″
4″ NPS 4 IPS SDR11 16″ x 18″
4″ NPS 4 IPS SDR11.5 16″ x 18″
6″ NPS 6 IPS SDR11.5 18″ x 18″
6″ NPS 6 IPS SDR13.5 18″ x 18″
8″ NPS 8 IPS SDR11 18″ x 18″
8″ NPS 8 IPS SDR11.5 18″ x 18″
8″ NPS 8 IPS SDR13.5 18″ x 18″

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