Fernco

Fernco 1056 Flexible Coupling – Cast Iron, Plastic, Steel & Copper

In stock

SKU: 1056-075

(0)

Ships Same Day

$10.11

Size

Express Checkout

✔ In Stock — Ships Same Day or Next Business Day
✔ Trusted by contractors and industrial buyers
✔ Bulk pricing available — Request a Quote

Buying in bulk?
Contact us for contractor pricing or large quantity discounts →

✓ Connects cast iron, plastic, copper, steel & lead — same or different materials and sizes
✓ Positive seal against infiltration and exfiltration on DWV, 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 1056 is the workhorse flexible coupling for DWV, sewer, and drain work — the part most contractors just call “a Fernco.” It joins two pipes of the same or different material and outside diameter with a watertight, no-hub connection, with no primers, glue, or solvent odors.

The sleeve is molded from elastomeric PVC that resists chemicals, UV, fungus growth, and normal sewer gases, and the band is locked down with two 300-series stainless steel worm-gear clamps that won’t rust. One coupling connects cast iron, plastic (PVC, ABS, CPVC, smooth-wall HDPE), copper, steel, or lead. Stocked 3/4″ through 24″ in straight and reducing sizes.

Applications

Drain, waste & vent (DWV) connections and repairs
Sewer and drain lines, above or below ground
Joining dissimilar pipe materials — cast iron to plastic, plastic to steel, and so on
Connecting same or different outside diameters with straight and reducing couplings
Fast no-hub tie-ins without primers, glue, or solvent cement

Key Features

Elastomeric PVC sleeve — leak-proof, root-proof, resistant to chemicals, UV, fungus 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, corrosion resistant
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

Part No.	Connects	Price
1056-075	3/4"	$10.11
1056-100	1"	$10.11
1056-125	1-1/4"	$4.66
1056-150	1-1/2"	$4.98
1056-150/125	1-1/2" x 1-1/4"	$5.15
1056-22	2"	$5.36
1056-215	2" x 1-1/2"	$5.66
1056-33	3"	$7.23
1056-315	3" x 1-1/2"	$9.42
1056-32	3" x 2"	$6.69
1056-44	4"	$9.05
1056-42	4" x 2"	$12.62
1056-43	4" x 3"	$9.75
1056-55	5"	$15.32
1056-54	5" x 4"	$17.03
1056-66	6"	$19.35
1056-64	6" x 4"	$22.72
1056-65	6" x 5"	$24.05
1056-88	8"	$29.77
1056-84	8" x 4"	$130.06
1056-86	8" x 6"	$35.95
1056-1010	10"	$44.69
1056-10-8	10" x 8"	$48.95
1056-1212	12"	$52.15
1056-1210	12" x 10"	$57.77
1056-1515	15"	$177.38
1056-1818	18"	$392.62
1056-2424	24"	$526.84

Select your size from the dropdown above. For exact outside-diameter ranges by size, see the Fernco dimensional drawings linked below.

Best Used For

Repairing or extending cast iron and plastic DWV lines
Transitioning between two different pipe materials
Reducing between two pipe sizes with a single fitting
Any sewer, drain, waste or vent connection that needs a fast, code-compliant seal

FAQ

What pipe materials does it connect?

Cast iron, plastic (PVC, ABS, CPVC, smooth-wall HDPE), copper, steel, and lead — in any combination, same or different sizes.

Can it go underground?

Yes. The 1056 is rated for above- and below-ground DWV, sewer, and drain use and conforms to ASTM C1173, ASTM D5926, and CSA B602.

Standard vs. Strong Back RC — which do I need?

The standard 1056 uses two stainless clamps over a PVC sleeve. If the joint sees heavy earth loads or shear and needs to stay rigid, step up to the Strong Back RC version, which adds a stainless steel shear shield.

How do I size a reducing coupling?

Reducing sizes are listed as large × small (for example, 6″ x 4″). Match each end to your pipe’s nominal size from the table above.