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1001-2121 Standard Flexible Coupling
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1001 Series · Standard Flexible Coupling
Fernco 1001-2121 21" X 21"Clay Pipe Flexible Coupling Connector Sewer and Drain Coupler Adapter in Black
Part # 1001-2121
- Flexible fit. Specifically designed to connect 21" clay to 21" clay pipes.
- Unsurpassed durability. Provides a permanent, leak-proof solution for sewer, drain, waste, and vent piping needs, ensuring enduring...
- No-mess installation. Skip the messy glues, primers, and their unwanted odors with quick and hassle-free installation.
- American craftsmanship. With over 60 years of proud manufacturing in the USA, Fernco's products reflect unparalleled quality and...
Dimensions
| End 1 pipe OD range | 23.00" to 25.25" |
| End 2 pipe OD range | 23.00" to 25.25" |
| End 1 inside diameter | 24.50" |
| Length | 26.91 in |
| Width | 26.91 in |
| Height | 10.00 in |
| Weight | 19.12 lb |
Product details
Introducing the Fernco 1001-2121 21" x 21" flexible pipe coupling connector for clay pipe, the ultimate solution for seamless sewer, drain and plumbing connections. Specifically designed to effortlessly connect 21" clay to 21" clay pipes, this coupling accommodates pipe outer diameters ranging from 23"-25.25" on one end and 23"-25.25" on the other end, guaranteeing a flexible fit for various applications. Crafted with unbeatable quality and performance in mind, Fernco couplings are constructed from elastomeric polyvinyl chloride, ensuring a durable, leak-proof fitting resistant to chemicals and sewer gases.
Trusted by professionals and homeowners alike, Fernco couplings provide long-lasting, watertight seals for sewer and drain connections without the need for messy glues or primers. Suitable for seamless integration in both vertical and horizontal installations. With a maximum test pressure of 4.3 PSI and an intermittent operating temperature of 140 degrees f, these couplings are leak-proof, root-proof, and resistant to many chemicals, ultraviolet rays, fungus growth, and normal sewer gases, ensuring unmatched reliability and durability for your waterworks and plumbing needs. Proudly manufactured in the united states for over 60 years, Fernco is the trusted and preferred choice for dependable waterworks and plumbing solutions.
Unmatched quality and performance. Engineered for lasting durability in plumbing, sewer, and drain applications, Fernco couplings offer a robust, leak-proof fitting, resistant to chemicals and sewer gases.
The preferred pipe connector. Fernco couplings stand as the top choice for flexible pipe connections in waste, drain, and vent applications. Trusted by plumbers, contractors, and municipalities worldwide.
Specs and codes. Complies with ASTM d 5926, c 1173, CSA b602 and are UPC approved. Rated for above ground and below ground use. Maximum test pressure: 4.3 PSI.
Specifications
| Connection | Mechanical |
| Fitting type | Straight Coupling |
| Flexible | Yes |
| Material | Elastomeric PVC, Stainless Steel |
| Color | Black |
| Standards | ASTM C1173, ASTM D5926, CSA B602, UPC |
| Application | Above Ground, DWV |
| Max test pressure | 4.3 psi |
| Temperature range | -30°F to 140°F |
Drawings and downloads
Documents
Dimensional drawing
1001-2121, PDF · 108.11 KB
Compare 1001 Series sizes
-
- Size
- 4" x 4"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 4.85" to 5.55"
- Strong Back RC
- 1001-44RC
-
- Size
- 4" x 4"
- Pipe OD range
- 5.15" to 5.85"
-
- Size
- 4" x 4"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 5.15" to 5.85"
- Strong Back RC
- 1001-44WCRC
-
- Size
- 5" x 4"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 5.65" to 6.35" / 4.85" to 5.55"
-
- Size
- 5" x 5"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 5.65" to 6.35"
- Strong Back RC
- 1001-55RC
-
- Size
- 6" x 4"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 7.00" to 7.60" / 5.10" to 5.80"
- Strong Back RC
- 1001-64RC
-
- Size
- 6" x 4"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 7.50" to 8.25" / 5.40" to 5.60"
-
- Size
- 6" x 5"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 7.00" to 7.60" / 5.65" to 6.35"
-
- Size
- 6" x 6"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 7.00" to 7.75" / 7.05" to 7.75"
- Strong Back RC
- 1001-66RC
-
- Size
- 6" x 6"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 7.50" to 8.25"
- Strong Back RC
- 1001-66WCRC
-
- Size
- 8" x 4"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 9.30" to 10.05" / 5.03" to 5.22"
-
- Size
- 8" x 6"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 9.30" to 10.05" / 6.75" to 7.30"
- Strong Back RC
- 1001-86RC
-
- Size
- 8" x 6"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 9.55" to 10.20" / 7.70" to 7.90"
- Strong Back RC
- 1001-86WCRC
-
- Size
- 8" x 8"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 9.20" to 9.85" / 9.10" to 9.85"
- Strong Back RC
- 1001-88RC
-
- Size
- 8" x 8"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 9.55" to 10.20"
- Strong Back RC
- 1001-88WCRC
-
- Size
- 10" x 8"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 12.00" to 12.70" / 9.55" to 9.75"
- Strong Back RC
- 1001-10-8RC
-
- Size
- 10" x 10"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 12.00" to 12.70"
- Strong Back RC
- 1001-1010RC
-
- Size
- 10" x 10"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 12.00" to 12.70"
- Strong Back RC
- 1001-1010WCRC
-
- Size
- 12" x 10"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 13.75" to 14.70" / 11.75" to 12.70"
-
- Size
- 12" x 12"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 13.75" to 14.70"
- Strong Back RC
- 1001-1212RC
-
- Size
- 12" x 12"
- Pipe materials
- Western Clay to Western Clay
- Pipe OD range
- 14.50" to 15.45"
- Strong Back RC
- 1001-1212WCRC
-
- Size
- 15" x 10"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 17.00" to 18.65" / 12.50" to 12.70"
-
- Size
- 15" x 12"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 17.00" to 18.30" / 14.28" to 14.48"
- Strong Back RC
- 1001-1512RC
-
- Size
- 15" x 15"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 17.15" to 18.65"
- Strong Back RC
- 1001-1515RC
-
- Size
- 18" x 18"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 20.85" to 22.50" / 21.00" to 22.50"
- Strong Back RC
- 1001-1818RC
-
1001-2121 (this part)
- Size
- 21" x 21"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 23.00" to 25.25"
- Strong Back RC
- 1001-2121RC
-
- Size
- 24" x 24"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 27.50" to 29.75"
- Strong Back RC
- 1001-2424RC
-
- Size
- 27" x 27"
- Pipe materials
- Clay to Clay
- Pipe OD range
- 30.90" to 33.15"
- Strong Back RC
- 1001-2727RC
| Part | Size | Pipe materials | Pipe OD range (end 1 / end 2) | Strong Back RC Shielded version |
|---|---|---|---|---|
| 1001-44 | 4" x 4" | Clay to Clay | 4.85" to 5.55" | 1001-44RC |
| 1001-44RCWC | 4" x 4" | 5.15" to 5.85" | ||
| 1001-44WC | 4" x 4" | Western Clay to Western Clay | 5.15" to 5.85" | 1001-44WCRC |
| 1001-54 | 5" x 4" | Clay to Clay | 5.65" to 6.35" / 4.85" to 5.55" | |
| 1001-55 | 5" x 5" | Clay to Clay | 5.65" to 6.35" | 1001-55RC |
| 1001-64 | 6" x 4" | Clay to Clay | 7.00" to 7.60" / 5.10" to 5.80" | 1001-64RC |
| 1001-64WC | 6" x 4" | Western Clay to Western Clay | 7.50" to 8.25" / 5.40" to 5.60" | |
| 1001-65 | 6" x 5" | Clay to Clay | 7.00" to 7.60" / 5.65" to 6.35" | |
| 1001-66 | 6" x 6" | Clay to Clay | 7.00" to 7.75" / 7.05" to 7.75" | 1001-66RC |
| 1001-66WC | 6" x 6" | Western Clay to Western Clay | 7.50" to 8.25" | 1001-66WCRC |
| 1001-84 | 8" x 4" | Clay to Clay | 9.30" to 10.05" / 5.03" to 5.22" | |
| 1001-86 | 8" x 6" | Clay to Clay | 9.30" to 10.05" / 6.75" to 7.30" | 1001-86RC |
| 1001-86WC | 8" x 6" | Western Clay to Western Clay | 9.55" to 10.20" / 7.70" to 7.90" | 1001-86WCRC |
| 1001-88 | 8" x 8" | Clay to Clay | 9.20" to 9.85" / 9.10" to 9.85" | 1001-88RC |
| 1001-88WC | 8" x 8" | Western Clay to Western Clay | 9.55" to 10.20" | 1001-88WCRC |
| 1001-10-8 | 10" x 8" | Clay to Clay | 12.00" to 12.70" / 9.55" to 9.75" | 1001-10-8RC |
| 1001-1010 | 10" x 10" | Clay to Clay | 12.00" to 12.70" | 1001-1010RC |
| 1001-1010WC | 10" x 10" | Western Clay to Western Clay | 12.00" to 12.70" | 1001-1010WCRC |
| 1001-1210 | 12" x 10" | Clay to Clay | 13.75" to 14.70" / 11.75" to 12.70" | |
| 1001-1212 | 12" x 12" | Clay to Clay | 13.75" to 14.70" | 1001-1212RC |
| 1001-1212WC | 12" x 12" | Western Clay to Western Clay | 14.50" to 15.45" | 1001-1212WCRC |
| 1001-1510 | 15" x 10" | Clay to Clay | 17.00" to 18.65" / 12.50" to 12.70" | |
| 1001-1512 | 15" x 12" | Clay to Clay | 17.00" to 18.30" / 14.28" to 14.48" | 1001-1512RC |
| 1001-1515 | 15" x 15" | Clay to Clay | 17.15" to 18.65" | 1001-1515RC |
| 1001-1818 | 18" x 18" | Clay to Clay | 20.85" to 22.50" / 21.00" to 22.50" | 1001-1818RC |
| 1001-2121 (this part) | 21" x 21" | Clay to Clay | 23.00" to 25.25" | 1001-2121RC |
| 1001-2424 | 24" x 24" | Clay to Clay | 27.50" to 29.75" | 1001-2424RC |
| 1001-2727 | 27" x 27" | Clay to Clay | 30.90" to 33.15" | 1001-2727RC |
Also for above ground
Proflex shielded couplings
A stainless steel shield over the coupling for transitions between cast iron, plastic, steel and copper drain lines.
See Proflex
Made in the USA
Made for pros by pros
The 1001-2121 is made in the USA. Fernco has built flexible couplings in Davison, Michigan since 1964, by people who take the work as seriously as you do.
Meet the team
Got questions about the 1001-2121?
Send us a message and the right team will reply, usually within one business day. Or call us, Monday to Friday, 8:00 am to 5:00 pm ET.