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Integrity Fusion  |  SKU: 30054272  |  MPN: 100506

MJ Adapter | IPS & DIPS | SDR 9–11 | Molded HDPE

$68.50
price per each (min. order qty 3)
Size
SDR
Design
  • Pressure-Rated MJ Transition – Connects HDPE to mechanical joint fittings using AWWA C111 components
  • PE4710/PE100 Molded Body – High-strength, corrosion-resistant construction for long service life
  • Optional 304 SS Stiffener – Added rigidity and improved sealing performance for HDPE in MJ sockets
  • IPS & DIPS Options – Available in SDR 9 and SDR 11 with or without factory-installed stiffeners
📄 Download Spec Sheet

MJ Adapter | IPS & DIPS | SDR 9 & SDR 11 | With or Without Stiffener

Integrity Fusion MJ Adapters provide reliable, pressure-rated mechanical joint transitions between HDPE piping systems and standard MJ (mechanical joint) fittings, valves, and hydrants. Manufactured in the USA from high-quality PE4710/PE100 bi-modal resin, these adapters are available in both IPS and DIPS sizes, with optional 304 stainless steel internal stiffeners for added rigidity and sealing performance.

These molded adapters meet ASTM D2513, ASTM D3261, and AWWA C901/C906 standards, and are compatible with standard MJ glands, gaskets, and T-bolts per AWWA C111. All potable-water sizes are NSF-61 certified for drinking water applications.

Key Features & Benefits

  • PE4710/PE100 Resin: High strength, long-term durability, and superior pressure performance.
  • Optional 304 Stainless Steel Stiffener: Reinforces the pipe inside the MJ connection to prevent ovaling and ensure proper gasket compression.
  • Fully MJ-Compatible: Works with standard mechanical joint hardware and gaskets.
  • Molded HDPE Body: Ensures exceptional dimensional accuracy and uniform wall structure.
  • NSF-61 & NSF-14 Listed: Approved for municipal potable water applications.
  • Industry Standard Compliance: Meets ASTM and AWWA performance requirements.

Common Applications

Municipal Potable Water • Natural Gas Distribution • Wastewater Systems • Industrial Piping • Hydrant Leads • Treatment Plants • Mining & Slurry • Plant Utilities

When to Choose an MJ Adapter With or Without a Stiffener

MJ Adapter Stiffeners (also known as insert stiffeners) are internal sleeves that reinforce the HDPE pipe inside a mechanical joint connection. They help maintain roundness and support the gasket sealing area under bolt compression.

What a Stiffener Does

  • Prevents Ovaling: Keeps the HDPE pipe round when the MJ gland is tightened.
  • Ensures Proper Seal: Supports the gasket compression area for a watertight or gastight connection.
  • Increases Rigidity: Helps HDPE perform similarly to DI or PVC in compression-based joints.

When to Use an MJ Adapter with a Stiffener

  • When installing HDPE into MJ valves, hydrants, tees, or fittings
  • Where project specifications require internal stiffeners
  • Higher pressure systems or larger diameters
  • For added long-term gasket sealing assurance

When a Non-Stiffened MJ Adapter Is Acceptable

  • MJ fittings that include internal bore support
  • Lower-pressure systems where roundness tolerances are maintained
  • Where specifications do not require stiffeners
  • Installers using high-quality PE4710 pipe that maintains shape well

Rule of Thumb: If unsure, selecting the w/ Stiffener option provides extra security and is preferred in most utility and municipal installations.

Technical Specifications – IPS SDR 11 (200 PSI)

Nominal Size Note A (in.) B (in.) C (in.) D (in.) Weight (lbs) Item Code FM Class
3" IPS - 9.00 3.500 2.34 3.960 1.45 100504 FM 200
3" IPS w/ stiffener 9.00 3.500 2.34 3.960 1.85 100506 FM 200
4" IPS - 10.25 4.500 2.34 4.800 2.55 100512 FM 200
4" IPS w/ stiffener 10.25 4.500 2.34 4.800 3.00 100514 FM 200
6" IPS - 11.31 6.625 2.34 6.900 5.50 100520 FM 200
6" IPS w/ stiffener 11.31 6.625 2.34 6.900 6.15 100522 FM 200
8" IPS - 11.94 8.625 2.34 9.050 9.60 100528 FM 200
8" IPS w/ stiffener 11.94 8.625 2.34 9.050 10.50 100530 FM 200
10" IPS - 13.56 10.75 2.34 11.10 15.90 100536 FM 200
10" IPS w/ stiffener 13.56 10.75 2.34 11.10 17.10 100538 FM 200
12" IPS - 13.00 12.75 2.34 13.20 23.90 100544 FM 200
12" IPS w/ stiffener 13.00 12.75 2.34 13.20 24.20 100546 FM 200
14" IPS - 13.00 14.00 1.75 15.30 29.00 100550 —
14" IPS w/ stiffener 13.00 14.00 1.75 15.30 32.00 100551 —
16" IPS - 13.00 16.00 1.75 17.40 41.00 100554 —
16" IPS w/ stiffener 13.00 16.00 1.75 17.40 43.00 100555 —
18" IPS - 13.00 18.00 1.75 19.50 54.00 100558 —
18" IPS w/ stiffener 13.00 18.00 1.75 19.50 57.00 100559 —
20" IPS - 15.22 20.00 2.54 21.60 71.00 100562 —
20" IPS w/ stiffener 15.22 20.00 2.54 21.60 73.00 100563 —

Technical Specifications – IPS SDR 9 (255 PSI)

Nominal Size Note A (in.) B (in.) C (in.) D (in.) Weight (lbs) Item Code FM Class
3" IPS - 9.00 3.500 2.34 3.960 1.65 100505 FM 250
3" IPS w/ stiffener 9.00 3.500 2.34 3.960 2.05 100507 FM 250
4" IPS - 10.25 4.500 2.34 4.800 2.95 100513 FM 250
4" IPS w/ stiffener 10.25 4.500 2.34 4.800 3.35 100515 FM 250
6" IPS - 11.31 6.625 2.34 6.900 6.20 100521 FM 250
6" IPS w/ stiffener 11.31 6.625 2.34 6.900 6.80 100523 FM 250
8" IPS - 11.94 8.625 2.34 9.050 11.15 100529 FM 250
8" IPS w/ stiffener 11.94 8.625 2.34 9.050 12.70 100531 FM 250
10" IPS - 13.56 10.75 2.34 11.10 18.50 100537 FM 250
10" IPS w/ stiffener 13.56 10.75 2.34 11.10 19.60 100539 FM 250
12" IPS - 13.00 12.75 2.34 13.20 28.55 100545 FM 250
12" IPS w/ stiffener 13.00 12.75 2.34 13.20 37.50 100547 FM 250

Technical Specifications – DIPS SDR 11 (200 PSI)

Nominal Size Note A (in.) B (in.) C (in.) D (in.) Weight (lbs) Item Code FM Class
4" DIPS - 10.25 4.800 2.34 4.800 2.65 100508 FM 200
4" DIPS w/ stiffener 10.25 4.800 2.34 4.800 3.10 100510 FM 200
6" DIPS - 11.31 6.900 2.34 6.900 5.70 100516 FM 200
6" DIPS w/ stiffener 11.31 6.900 2.34 6.900 6.33 100518 FM 200
8" DIPS - 11.94 9.050 2.34 9.050 9.95 100524 FM 200
8" DIPS w/ stiffener 11.94 9.050 2.34 9.050 10.90 100526 FM 200
10" DIPS - 13.56 11.10 2.34 11.10 16.30 100532 FM 200
10" DIPS w/ stiffener 13.56 11.10 2.34 11.10 17.35 100534 FM 200
12" DIPS - 13.00 13.20 2.34 13.20 22.90 100540 FM 200
12" DIPS w/ stiffener 13.00 13.20 2.34 13.20 23.75 100542 FM 200
14" DIPS - 14.00 15.30 2.22 15.30 34.00 100548 —
14" DIPS w/ stiffener 14.00 15.30 2.22 15.30 36.00 100549 —
16" DIPS - 14.00 17.40 2.22 17.40 45.00 100552 —
16" DIPS w/ stiffener 14.00 17.40 2.22 17.40 47.00 100553 —
18" DIPS - 15.22 19.50 2.63 19.50 59.00 100556 —
18" DIPS w/ stiffener 15.22 19.50 2.63 19.50 62.00 100557 —
20" DIPS - 15.22 21.60 2.63 21.60 75.00 100560 —
20" DIPS w/ stiffener 15.22 21.60 2.63 21.60 77.00 100561 —

Technical Specifications – DIPS SDR 9 (255 PSI)

Nominal Size Note A (in.) B (in.) C (in.) D (in.) Weight (lbs) Item Code FM Class
4" DIPS - 10.25 4.800 2.34 4.800 3.00 100509 FM 250
4" DIPS w/ stiffener 10.25 4.800 2.34 4.800 3.45 100511 FM 250
6" DIPS - 11.31 6.900 2.34 6.900 6.45 100517 FM 250
6" DIPS w/ stiffener 11.31 6.900 2.34 6.900 7.05 100519 FM 250
8" DIPS - 11.94 9.050 2.34 9.050 11.75 100525 FM 250
8" DIPS w/ stiffener 11.94 9.050 2.34 9.050 12.55 100527 FM 250
10" DIPS - 13.56 11.10 2.34 11.10 18.75 100533 FM 250
10" DIPS w/ stiffener 13.56 11.10 2.34 11.10 19.75 100535 FM 250
12" DIPS - 13.00 13.20 2.34 13.20 27.20 100541 FM 250
12" DIPS w/ stiffener 13.00 13.20 2.34 13.20 28.60 100543 FM 250

Refer to the downloadable specification sheet above for complete technical data.

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