Fernco

Fernco 1051 Coupling – Asbestos-Cement & Ductile Iron to Cast Iron, Plastic

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SKU: 1051-44

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$9.78

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✓ Joins asbestos-cement (AC) or ductile iron to cast iron or plastic
✓ Positive seal against infiltration and exfiltration on sewer & drain lines
✓ 300-series stainless steel clamps — corrosion resistant, install with a nut driver
✓ Conforms to ASTM C1173, ASTM D5926 & CSA B602 — passes inspection

High Demand Item – Frequently Reordered by Contractors

The Fernco 1051 transitions asbestos-cement (AC) fibre or ductile iron pipe to cast iron or plastic — sized for the larger AC/ductile OD on one end and the cast iron/plastic OD on the other.

The elastomeric PVC sleeve resists chemicals, UV, and normal sewer gases, with 300-series stainless steel clamps. Sizes are listed AC/ductile side × cast iron/plastic side, stocked 4″ through 12″.

Applications

Transitioning asbestos-cement (AC) sewer pipe to cast iron or plastic
Connecting ductile iron to cast iron or plastic
Repairs and tie-ins on older AC sewer systems
Sewer and drain transitions above or below ground

Key Features

Elastomeric PVC sleeve — leak-proof, root-proof, resistant to chemicals, UV and sewer gases
Two 300-series stainless steel clamps, corrosion resistant and rustproof
Connects same or different pipe sizes and materials
Each coupling marked with part number, size, and compatible pipe materials
Made in the USA — sizes 15″ and below are AIS and BABA compliant

Specifications

Sleeve Material	Elastomeric PVC
Clamps	300-series stainless steel
Standards	ASTM C1173, ASTM D5926, CSA B602, UPC
Installation Torque	60 in-lbs
Max Test Pressure	4.3 PSI (29.6 kPa)
Operating Temperature	-30°F to 140°F (non-consistent)
Origin	Made in USA (15″ and below AIS/BABA compliant)

Sizes & Connections (AC/Ductile × CI/Plastic)

Part No.	Connects	Price
1051-44	4" AC/Ductile × 4" CI/Plastic	$9.78
1051-64	6" AC/Ductile × 4" CI/Plastic	$22.72
1051-66	6" AC/Ductile × 6" CI/Plastic	$20.90
1051-88	8" AC/Ductile × 8" CI/Plastic	$32.15
1051-1010	10" AC/Ductile × 10" CI/Plastic	$44.69
1051-1212	12" AC/Ductile × 12" CI/Plastic	$52.15

For exact outside-diameter ranges by size, see the Fernco dimensional drawings linked below.

Best Used For

Tying new cast iron or plastic into existing AC sewer pipe
Ductile iron to cast iron or plastic transitions
AC sewer main and lateral repairs
Any sewer or drain joint needing a fast, code-compliant seal

FAQ

How are the sizes listed?

AC/ductile side first, cast iron/plastic side second — for example, 6″ × 4″ connects 6″ AC or ductile iron to 4″ cast iron or plastic.

Working with asbestos cement?

Follow all applicable handling regulations when cutting or disturbing AC pipe. The coupling itself installs over the existing OD with stainless clamps.

Need a shielded version?

For buried joints under heavy load, see the Fernco 1051RC Strong Back shielded coupling.