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Ultra-Rib and ETI-sized pipe

Ultra-Rib Couplings

Couplings for Ultra-Rib and ETI-sized PVC sewer pipe, 12″ to 24″. Repair or extend an Ultra-Rib line, or transition it to SDR 35.

 
12″ to 24″ ETI to ETI ETI to SDR 35 ASTM D5926
 
What they’re for

Made for Ultra-Rib and ETI-sized pipe.

Ultra-Rib PVC sewer pipe has a ribbed outside wall, so its ETI-sized outside diameter is larger than smooth SDR 35 pipe of the same nominal size. The 1072 and 1073 series are built to ETI outside diameters, from 12″ to 24″.

  • ETI to ETI. The 1072 series joins Ultra-Rib to Ultra-Rib for repairs and extensions.
  • ETI to SDR 35. The 1073 series transitions Ultra-Rib to standard PVC sewer pipe. An insert reducer bushing is included.
  • Five sizes in each series. 12″, 15″, 18″, 21″ and 24″.
Fernco Ultra-Rib coupling
Sizes

Find your size.

Measure the outside diameter of each pipe. On Ultra-Rib, measure over the ribs. No calipers? Wrap a tape around the pipe and divide by 3.14.

PartConnectsETI end O.D.Other end O.D.
1072-121212″ ETI to 12″ ETI13.50–15.00″13.50–15.00″
1072-151515″ ETI to 15″ ETI16.30–17.80″16.30–17.80″
1072-181818″ ETI to 18″ ETI19.80–21.30″19.80–21.30″
1072-212121″ ETI to 21″ ETI23.25–24.75″23.25–24.75″
1072-242424″ ETI to 24″ ETI25.50–27.00″25.50–27.00″
1073-121212″ ETI to 12″ SDR 3513.50–15.00″12.00–12.75″
1073-151515″ ETI to 15″ SDR 3516.30–17.80″14.50–15.75″
1073-181818″ ETI to 18″ SDR 3519.80–21.30″17.50–19.00″
1073-212121″ ETI to 21″ SDR 3523.25–24.75″21.00–22.00″
1073-242424″ ETI to 24″ SDR 3525.50–27.00″24.00–25.00″

Part numbers link to dimensional drawings. Ultra-Rib is also in the Standard Couplings finder.

Specifications.

Sizes12″, 15″, 18″, 21″ and 24″
BodyFlexible PVC, 10″ long
Clamps300 series stainless steel. Installation torque is on each part’s drawing.
1073 seriesInsert reducer bushing included
Maximum test pressure4.3 psi (29.6 kPa)
Maximum operating temperature140°F, non-continuous
Minimum operating temperature−30°F
StandardASTM D5926

Documents.

A dimensional drawing for each coupling.

1072-1212Dimensional drawing · 12″ ETI to 12″ ETIView drawing 1072-1515Dimensional drawing · 15″ ETI to 15″ ETIView drawing 1072-1818Dimensional drawing · 18″ ETI to 18″ ETIView drawing 1072-2121Dimensional drawing · 21″ ETI to 21″ ETIView drawing 1072-2424Dimensional drawing · 24″ ETI to 24″ ETIView drawing 1073-1212Dimensional drawing · 12″ ETI to 12″ SDR 35View drawing 1073-1515Dimensional drawing · 15″ ETI to 15″ SDR 35View drawing 1073-1818Dimensional drawing · 18″ ETI to 18″ SDR 35View drawing 1073-2121Dimensional drawing · 21″ ETI to 21″ SDR 35View drawing 1073-2424Dimensional drawing · 24″ ETI to 24″ SDR 35View drawing