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The original Fernco connection
Standard Flexible Couplings
Join clay, concrete, cast iron, ductile iron, plastic and steel pipe, the same size or different, with a flexible PVC sleeve and two stainless steel clamps. ¾″ to 27″. Made in the USA.
Why pros keep them on the truck
The sleeve conforms to differences in outside diameter between pipe materials, so one coupling joins pipe that doesn’t match. Tighten the clamps to 60 in-lb and it seals against infiltration and exfiltration.
- Seals both ways. Against infiltration and exfiltration.
- Joins what you find. Same or different sizes and materials.
- Marked on the part. Part number, size and pipe materials molded in.
Specifications
Features
- Made in the USA
- AIS and BABA compliant, 15″ and smaller
- Positive seal against infiltration and exfiltration
- Resistant to chemicals, ultraviolet rays, fungus growth and normal sewer gases
- Conforms to ASTM D5926, ASTM C1173 and CSA B602
- Stainless steel clamps are corrosion-resistant and rustproof
Technical
| Installation torque, 15" and smaller (standard clamps) | 60 in-lb |
| Installation torque, 16" and larger (high torque clamps) | 120 in-lb |
| Maximum test pressure | 4.3 psi (29.6 kPa) |
| Maximum operating temperature | 140°F non-continuous |
| Minimum operating temperature | -30° F |
Find the right series for the connection
Fernco Standard Couplings are designed around the outside diameters of the pipe materials being connected. Start with the pipe types on each side of the connection.
1001 Series
Clay to Clay
1002 Series
Clay to Cast Iron / Plastic / Steel
1003 Series
Clay to Ductile Iron
1004 Series
Concrete to Concrete
1005 Series
Concrete to Clay
1006 Series
Concrete to Cast Iron / Plastic / Steel
1051 Series
Ductile Iron to Cast Iron / Plastic / Steel
1056 Series
Cast Iron / Plastic / Steel to Cast Iron / Plastic / Steel
1057 Series
Concrete to Ductile Iron
1070 / 1071 Series
Corrugated polyethylene connections: 1070 joins corrugated poly to plastic, 1071 joins corrugated poly to corrugated poly.
1072 / 1073 Ultra-Rib
Flexible couplings sized for Ultra-Rib profile sewer pipe.
Large Diameter
Custom-built connections for large-diameter sanitary and storm sewer pipe.
Size finder
Choose the material and size of the pipe on each side. Fernco couplings seal by outside diameter, so the finder returns every Standard Coupling, and the HULK, that fits both pipes. Plastic and steel use Schedule 40 (IPS) outside diameters.
Coupling finder
Pick the material and size of the pipe on each side. The finder returns every Fernco coupling that fits both pipe outside diameters, showing the standard coupling and the reinforced options for below-ground use. Plastic and steel use Schedule 40 (IPS) outside diameters.
Recommended Below Ground Applications
Strong Back 1000 & 5000 RC, XL RC and HULK, for buried joints.
Standard Couplings
The baseline flexible coupling for the connection.
Recommendations are a general guide based on typical use. Coupling suitability depends on the pipe materials, application and burial conditions. Always confirm the coupling and its installation meet your local plumbing and building codes before installing.
XL
Need more holding power? Ask for XL.
Fernco XL couplings are available 12″ and below. They fit the same pipe outside diameters as the standard size, but the extra length and additional clamp bands grip more pipe for greater holding power. Sizes that offer an XL version are flagged “Also in XL” in the results.
Dimensional drawings
Find the drawing for any Standard Coupling size. Each one lists the dimensions in inches and millimeters, the pipe sizes it fits, and a PDF to download.
Literature
Installation instructions, submittals and catalogs for Standard Couplings.
All part numbers
244 Standard Couplings parts
Open any part for its specs, dimensional drawing and documents.
No part number matches.
1001 Series 29
1002 Series 29
1003 Series 27
1004 Series 17
1005 Series 9
1006 Series 25
1051 Series 21
1055 Series 19
1056 Series 49
- 1056-075
- 1056-3/250
- 1056-10-8
- 1056-22
- 1056-32
- 1056-33
- 1056-42
- 1056-43
- 1056-44
- 1056-54
- 1056-55
- 1056-64
- 1056-65
- 1056-66
- 1056-84
- 1056-86
- 1056-88
- 1056-100
- 1056-125
- 1056-150
- 1056-150/125
- 1056-215
- 1056-222
- 1056-250
- 1056-250/22
- 1056-250/125
- 1056-250/150
- 1056-315
- 1056-332
- 1056-415
- 1056-442
- 1056-443
- 1056-552
- 1056-662
- 1056-882
- 1056-1010
- 1056-1210
- 1056-1212
- 1056-1414
- 1056-1502
- 1056-1510
- 1056-1512
- 1056-1515
- 1056-1818
- 1056-2121
- 1056-2424
- 1056-2727
- 1056-10102
- 1056-12122
1057 Series 19
Frequently asked questions
Selection, installation and compliance answers for Standard Couplings.
What pipe materials do Fernco Standard Couplings connect?
Fernco Standard Couplings connect clay, cast iron, plastic, steel, concrete and ductile iron pipe, in same-material and transition joints. Each series is built for one pairing, for example the 1056 Series connects cast iron, plastic or steel to cast iron, plastic or steel, and the 1002 Series connects clay to cast iron, plastic or steel. Sizes run from 3/4 inch through 27 inches.
Can a Standard Coupling be used underground?
Yes, where your local code allows it. Many local codes accept standard couplings below ground. For buried transitions that carry heavy earth loads or where the pipes may shift, Fernco recommends a Strong Back RC shielded coupling, which adds a stainless steel shear ring for alignment and shear resistance. For above-ground transitions that need a shield, a Proflex shielded coupling adds a stainless steel shield.
Are Fernco couplings a permanent solution?
Yes. Fernco Standard Couplings are a permanent connection, not a temporary repair. They are specified for new construction as well as repair work, and they conform to ASTM D5926, ASTM C1173 and CSA B602. The elastomeric PVC body resists sewer gases, ultraviolet light, fungus growth and normal chemicals, and the stainless steel clamps do not rust. Install to the specified torque and within the pressure and temperature ratings, and the joint is built to stay sealed for the service life of the piping.
What is the installation torque for a Standard Coupling?
Tighten the clamps to 60 inch-pounds on couplings 15 inches and smaller, which use standard 300 series stainless steel clamps. Couplings 16 inches and larger ship with high torque clamps and are tightened to 120 inch-pounds. Pressure test the joint before backfilling or concealing it.
What are the pressure and temperature ratings?
The maximum test pressure is 4.3 psi (29.6 kPa). The maximum operating temperature is 140 degrees F non-continuous and the minimum is -30 degrees F. Standard Couplings are made for drain, waste, vent and sewer service, not for pressurized water systems.
Are Fernco couplings code compliant?
Fernco Standard Couplings conform to ASTM D5926, ASTM C1173 and CSA B602. Listings by series, including UPC and IPC, are on the Codes and Standards page. Always confirm the application with your local plumbing code.
Are Standard Couplings AIS and BABA compliant?
Standard Couplings 15 inches and smaller are made in the USA and comply with the American Iron and Steel (AIS) and Build America, Buy America (BABA) requirements. See the AIS and BABA page for the letter and the list of compliant product lines.
Are Standard Couplings resistant to chemicals and sunlight?
The elastomeric PVC body resists chemicals, ultraviolet light, fungus growth and normal sewer gases, and the stainless steel clamps are corrosion-resistant and rustproof. For a specific chemical and concentration, check the Acid Resistance Chart.
How do I pick the right part number?
Start with the pipe material on each side of the joint, which sets the series. Then match the outside diameter of each pipe to the size range on the coupling. Reducing couplings connect two different sizes, for example the 1056-64 joins 6 inch and 4 inch cast iron, plastic or steel. The dimensional drawings list the outside diameter range for every part. If the pipe type or diameter is uncertain, contact Fernco for sizing help.
Need help finding the right coupling?
Tell us what pipe materials and sizes you're working with and our team can help point you toward the right Fernco connection.