When you need a dependable, movement-tolerant joint in a 2" PVC DWV system, the Fernco Schedule 40 2 in. Hub X 2 in. Hub PVC 3-1/2 in. Expansion Coupling is built to perform. Designed for hub-to-hub connections in drainage, waste, and vent lines, this 3-1/2 inch expansion coupling blends the reliability of Schedule 40 PVC with a flexible, lead-free construction for safer, long-lasting plumbing repairs.
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Two 2" hub ends: hub-to-hub connections for standard PVC DWV piping
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3-1/2" length: provides ample overlap for a secure seal and robust alignment
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Schedule 40 PVC: matches common piping standards and system expectations for DWV
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Movement absorption: expansion capability helps accommodate soil settlement, temperature changes, and other shifts, reducing stress on joints
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Lead-free formulation: safer materials for long-term installations
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Maximum pressure: rated up to 4.3 (units not specified in the spec)
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Application: suitable for DWV systems—drain, waste, and vent piping in residential or light commercial scenarios
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Brand: Fernco, a trusted name in flexible pipe connections
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Certification notes: IAPMO certified: No; NSF listed: No
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Package details: Number in Package: 1
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End connections: Hub to Hub (2" x 2")
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Schedule type: Schedule 40
This expansion coupling is a practical solution when rigid fittings alone can’t accommodate movement from soil shifts, thermal expansion, or settling around the piping run. It’s especially useful in basement projects, laundry drains, or outdoor drainage where joints must tolerate a bit of flex without compromising a seal.
Ideal use scenarios include upgrading aging joints in a 2" PVC DWV circuit, repairing a cracked connection, or simplifying a retrofit where precise alignment is challenging. Compared to traditional rigid couplings, this Fernco expansion coupling provides a forgiving, secure seal with fewer parts and less risk of misalignment—saving you time and reducing the likelihood of future leaks.
Installation tips (safe, general guidance): ensure pipe ends are clean and dry, slide the coupling over the pipes to align hub ends, and secure according to local code requirements. After installation, perform a pressure test or water test to confirm a proper seal. Always follow local plumbing codes and manufacturer recommendations for materials, tools, and methods.
