Fernco Donuts
- Strong Compression Seal - Fernco Donuts create a dependable seal for sewer pipe joints and DWV connections such as sockets, hubs, bells, and spigots.
- Fast, Clean Installation - Eliminates the use of cement or mortar, helping reduce installation time and mess on the jobsite.
- Broad Compatibility - Available in hundreds of sizes and configurations for use with most brands and types of piping material.
PRODUCT DESCRIPTION
With one of the most comprehensive lineups of compression joint sealers in the industry, Fernco Donuts are trusted for creating strong, lasting joints in sewer pipe and DWV applications. These flexible PVC rings are designed to seal connections such as sockets, hubs, bells, and spigots without the need for traditional cement or mortar.
Fernco Donuts are called on to seal against infiltration and exfiltration, connect material-to-material transitions, and adapt size-to-size applications. Their resilient design flexes with ground movement, provides several points of seal to help overcome pipe surface irregularities, and delivers dependable performance across a wide range of plumbing systems.
COMMONLY USED DONUTS
| Part No. | Connection Type | Pipe Size | Application |
|---|---|---|---|
| 22U-139 | 2" Cast Iron Hub x 1-1/2" PVC | 1-1/2" SCH 40/STD | Reducing connection from 2" cast iron hub to 1-1/2" PVC pipe |
| 22U-205 | 2" SV Hub x Plastic | 2" SCH 40/STD | Standard 2" service weight hub to plastic pipe connection |
| 33U-305 | 3" SV Hub x DWV/Plastic | 3" SCH 40/STD | Common 3" DWV hub to plastic pipe connection |
| 44U-305 | 4" Cast Iron Hub x 3" Plastic | 3" SCH 40/STD | Reducing connection from 4" cast iron hub to 3" plastic pipe |
| 44U-405 | 4" Cast Iron Hub x Plastic | 4" SCH 40/STD | Standard 4" cast iron hub to plastic pipe connection |
| 490-405 | 4" Hub x SCH 40/STD | 4" SCH 40/STD | 4" hub to SCH 40/STD pipe connection |
Fernco offers thousands of donut sizes and configurations to fit a wide range of pipe materials, manufacturers, and hub dimensions.
DONUT SELECTION GUIDE
Identify the Connection
Determine the pipe materials and connection type (hub, bell, socket, or spigot) to ensure compatibility.
Measure Accurately
Donuts seal by compression and allow minimal tolerance—measure hub and pipe dimensions as precisely as possible.
Select the Correct Donut
Match the size, material, and application. When in doubt, consult Fernco or use a flexible coupling for plain-end connections.
SPECIFICATIONS
Fernco Donuts are engineered to provide a resilient, long-lasting seal for sewer pipe joints and DWV connections across a wide range of applications.
- Material - Made from strong chemical-resistant elastomeric PVC specially formulated for use as a sewer joint material.
- Standards - Complies with ASTM D5926, ASTM C1173, and Uniform Plumbing Code (UPC).