Fernco 1056-43 4 in. x 3 in. Flexible Coupling
Product Overview
The Fernco 1056-43 flexible reducing coupling transitions compatible 4 in. cast iron or PVC pipe to 3 in. cast iron or PVC pipe.
Key Features:
- 4 in. x 3 in. reducing flexible coupling
- For cast iron or PVC pipe transitions
- Flexible coupling for drain, sewer, vent, and waste applications
- Useful for repair and transition plumbing work
- 60 lb-in installation torque listed
Common Uses:
- Reducing drain pipe transitions
- Cast iron or PVC pipe repair
- Drain, sewer, vent, and waste applications where approved
Technical Specifications:
- Size: 4 in. x 3 in.
- Installation Torque: 60 lb-in.
- Temperature Range: -30°F to 140°F
- Overall Dimensions: 4.03 in. length x 5.17 in. width
FAQ
Is this a reducing coupling?
Yes. It transitions compatible 4 in. pipe to 3 in. pipe.
What materials is it used with?
It is listed for cast iron or PVC pipe.
What should I check before ordering?
Confirm pipe outside diameters, pipe materials, and local code requirements.
Why Buy From Big Frog Supply?
Big Frog Supply provides clear product details, helpful support, and fast online ordering.
Product Information
Product Information
Shipping & Returns
Shipping & Returns

Fernco 1056-43 4 in. x 3 in. Flexible Coupling
Fernco 1056-43 4 in. x 3 in. Flexible Coupling
Product Overview
The Fernco 1056-43 flexible reducing coupling transitions compatible 4 in. cast iron or PVC pipe to 3 in. cast iron or PVC pipe.
Key Features:
- 4 in. x 3 in. reducing flexible coupling
- For cast iron or PVC pipe transitions
- Flexible coupling for drain, sewer, vent, and waste applications
- Useful for repair and transition plumbing work
- 60 lb-in installation torque listed
Common Uses:
- Reducing drain pipe transitions
- Cast iron or PVC pipe repair
- Drain, sewer, vent, and waste applications where approved
Technical Specifications:
- Size: 4 in. x 3 in.
- Installation Torque: 60 lb-in.
- Temperature Range: -30°F to 140°F
- Overall Dimensions: 4.03 in. length x 5.17 in. width
FAQ
Is this a reducing coupling?
Yes. It transitions compatible 4 in. pipe to 3 in. pipe.
What materials is it used with?
It is listed for cast iron or PVC pipe.
What should I check before ordering?
Confirm pipe outside diameters, pipe materials, and local code requirements.
Why Buy From Big Frog Supply?
Big Frog Supply provides clear product details, helpful support, and fast online ordering.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Product Overview
The Fernco 1056-43 flexible reducing coupling transitions compatible 4 in. cast iron or PVC pipe to 3 in. cast iron or PVC pipe.
Key Features:
- 4 in. x 3 in. reducing flexible coupling
- For cast iron or PVC pipe transitions
- Flexible coupling for drain, sewer, vent, and waste applications
- Useful for repair and transition plumbing work
- 60 lb-in installation torque listed
Common Uses:
- Reducing drain pipe transitions
- Cast iron or PVC pipe repair
- Drain, sewer, vent, and waste applications where approved
Technical Specifications:
- Size: 4 in. x 3 in.
- Installation Torque: 60 lb-in.
- Temperature Range: -30°F to 140°F
- Overall Dimensions: 4.03 in. length x 5.17 in. width
FAQ
Is this a reducing coupling?
Yes. It transitions compatible 4 in. pipe to 3 in. pipe.
What materials is it used with?
It is listed for cast iron or PVC pipe.
What should I check before ordering?
Confirm pipe outside diameters, pipe materials, and local code requirements.
Why Buy From Big Frog Supply?
Big Frog Supply provides clear product details, helpful support, and fast online ordering.














