Fernco Strong-Back 1051-84RC 8" X 4" Ductile Iron to Cast Iron, Plastic and Steel Shielded RC Flexible Coupling

Part # 1051-84RC

Below-ground pipe connector excellence. Designed to resist heavy earth loads and shear forces, Fernco strong-back RC pipe couplings stand as the optimal...
The preferred pipe connector. Fernco couplings stand as the top choice for flexible pipe connections in waste, drain, and vent applications.
Unsurpassed durability. Provides a permanent, leak-proof solution for sewer, drain, waste, and vent piping needs, ensuring enduring...
American craftsmanship and compliance. Proudly manufactured in the USA for over 60 years.

1051 Series Size: 8" x 4"

Connects Ductile Iron to Cast Iron, Plastic and Steel

All documents

Dimensions

View full size

End 1 pipe OD range	8.55" to 9.25"
End 2 pipe OD range	4.40" to 4.60"
End 1 inside diameter	9.05"
End 2 inside diameter	4.50"
Length	9.82 in
Width	9.82 in
Height	6.25 in
Weight	3.48 lb

Product details

Introducing the Fernco strong-back 1051-84RC 8" x 4" RC shielded couplings, the ultimate solution for demanding pipe connections. Specifically designed to effortlessly connect 8" ductile iron to 4" cast iron, plastic, steel and copper pipes, this coupling accommodates pipe outer diameters ranging from 8.55"-9.25" on one end and 4.4"-4.6" on the other end, guaranteeing a flexible fit for various applications. Built to withstand challenging conditions, including slight off-set in host pipes, these shielded couplings offer unparalleled adaptability and resilience. Engineered for below-ground excellence, Fernco strong-back RC pipe couplings resist heavy earth loads and shear forces, ensuring secure connections that last.

Trusted by professionals worldwide, Fernco is the preferred choice for waste, drain, and vent applications. Plumbers, contractors, and municipalities rely on Fernco couplings for their unmatched performance and peace of mind. Fernco couplings deliver a permanent, leak-proof solution for sewer, drain, waste, and vent piping needs, meeting stringent requirements and standards with ease. Backed by industry-leading specs and codes compliance, including ASTM d 5926, c 1173 CSA B602, and UPC approval, Fernco couplings ensure reliability above and below ground. With a maximum test pressure of 4.3 PSI, these couplings are designed for waste, drain and vent applications. Crafted with pride in the USA for over 60 years, Fernco's legacy of american craftsmanship shines through in every product.

Unrivaled resilience in challenging conditions. Fernco strong-back RC shielded couplings accommodate challenging pipe connections, including slight off-set in host pipes.

Flexible fit. Specifically designed to connect 8" ductile iron to 4" cast iron, plastic, and steel pipes. This coupling accommodates pipe outer diameters (ODs) ranging from 8.55"-9.25" on one end and 4.4"-4.6" on the other end.

Specs and codes. Complies with ASTM d 5926, c 1173, CSA b602 and are UPC approved. Best for below ground use. Maximum test pressure: 4.3 PSI.

Specifications

Product
Connection	Mechanical
Fitting type	Reducing Coupling
Flexible	Yes
Material	Elastomeric PVC, Stainless Steel
Color	Black, Silver
Standards	ASTM C1173, ASTM D5926, CSA B602, UPC
Application	Below Ground, DWV

Performance
Max test pressure	4.3 psi
Temperature range	-30°F to 140°F

Compliance

AIS and BABA compliant

Meets American Iron and Steel and Build America, Buy America requirements for government and municipal projects.

AIS and BABA details

Drawings and downloads

Documents

Installation instructions All products

Compare 1051 Series sizes

Ductile Iron to Cast Iron, Plastic and Steel

1051-44RC

Size
4" x 4"

Pipe OD range
4.35" to 5.00" / 4.00" to 4.60"

Standard version
1051-44
1051-45RC

Size
4" x 5"

Pipe OD range
4.50" to 5.15" / 4.90" to 5.10"

Standard version
1051-45
1051-46RC

Size
4" x 6"

Pipe OD range
4.30" to 4.90" / 6.30" to 6.80"

Standard version
1051-46
1051-55RC

Size
5" x 5"

Pipe OD range
5.50" to 6.15" / 5.20" to 5.50"

Standard version
1051-55
1051-64RC

Size
6" x 4"

Pipe OD range
6.35" to 7.10" / 4.40" to 4.60"

Standard version
1051-64
1051-65RC

Size
6" x 5"

Pipe OD range
6.35" to 7.10" / 5.40" to 5.60"

Standard version
1051-65
1051-66RC

Size
6" x 6"

Pipe OD range
6.50" to 7.20" / 6.20" to 6.90"

Standard version
1051-66
1051-84RC (this part)

Size
8" x 4"

Pipe OD range
8.55" to 9.25" / 4.40" to 4.60"

Standard version
1051-84
1051-86RC

Size
8" x 6"

Pipe OD range
8.55" to 9.25" / 6.53" to 6.73"

Standard version
1051-86
1051-88RC

Size
8" x 8"

Pipe OD range
8.75" to 9.40" / 7.95" to 8.65"

Standard version
1051-88
1051-10-8RC

Size
10" x 8"

Pipe OD range
10.05" to 10.95" / 8.53" to 8.73"

Standard version
1051-10-8
1051-1010RC

Size
10" x 10"

Pipe OD range
10.05" to 10.95" / 9.80" to 10.70"

Standard version
1051-1010
1051-1210RC

Size
12" x 10"

Pipe OD range
12.55" to 13.30" / 10.50" to 10.70"

Standard version
1051-1210
1051-1212RC

Size
12" x 12"

Pipe OD range
12.55" to 13.30" / 12.50" to 12.70"

Standard version
1051-1212
1051-1215RC

Size
12" x 15"

Pipe OD range
13.10" to 13.30" / 14.50" to 15.75"

Standard version
1051-1215
1051-1515RC

Size
15" x 15"

Pipe OD range
14.90" to 16.00"

Standard version
1051-1515
1051-1818RC

Size
18" x 18"

Pipe OD range
19.00" to 20.10" / 18.60" to 18.80"

Standard version
1051-1818
1051-2424RC

Size
24" x 24"

Pipe OD range
24.30" to 26.30" / 24.60" to 24.80"

Standard version
1051-2424

Part	Size	Pipe OD range (end 1 / end 2)	Standard version
1051-44RC	4" x 4"	4.35" to 5.00" / 4.00" to 4.60"	1051-44
1051-45RC	4" x 5"	4.50" to 5.15" / 4.90" to 5.10"	1051-45
1051-46RC	4" x 6"	4.30" to 4.90" / 6.30" to 6.80"	1051-46
1051-55RC	5" x 5"	5.50" to 6.15" / 5.20" to 5.50"	1051-55
1051-64RC	6" x 4"	6.35" to 7.10" / 4.40" to 4.60"	1051-64
1051-65RC	6" x 5"	6.35" to 7.10" / 5.40" to 5.60"	1051-65
1051-66RC	6" x 6"	6.50" to 7.20" / 6.20" to 6.90"	1051-66
1051-84RC (this part)	8" x 4"	8.55" to 9.25" / 4.40" to 4.60"	1051-84
1051-86RC	8" x 6"	8.55" to 9.25" / 6.53" to 6.73"	1051-86
1051-88RC	8" x 8"	8.75" to 9.40" / 7.95" to 8.65"	1051-88
1051-10-8RC	10" x 8"	10.05" to 10.95" / 8.53" to 8.73"	1051-10-8
1051-1010RC	10" x 10"	10.05" to 10.95" / 9.80" to 10.70"	1051-1010
1051-1210RC	12" x 10"	12.55" to 13.30" / 10.50" to 10.70"	1051-1210
1051-1212RC	12" x 12"	12.55" to 13.30" / 12.50" to 12.70"	1051-1212
1051-1215RC	12" x 15"	13.10" to 13.30" / 14.50" to 15.75"	1051-1215
1051-1515RC	15" x 15"	14.90" to 16.00"	1051-1515
1051-1818RC	18" x 18"	19.00" to 20.10" / 18.60" to 18.80"	1051-1818
1051-2424RC	24" x 24"	24.30" to 26.30" / 24.60" to 24.80"	1051-2424