2 inch x 3 inch x 4 inch ADS Corrugated Downspout Reducing Adapter

464 ADS Corrugated Downspout Adapter 2" x 3" x 4" – Engineered for Secure Transitions

The 464 ADS Corr Adapt Downspout Adapter is designed to provide a smooth and reliable transition between rectangular downspouts and 4-inch corrugated drainage pipe. Commonly used in residential and light commercial applications, this fitting supports effective stormwater management by directing runoff away from structures and into subsurface drainage systems.

Molded from high-density polyethylene (HDPE), the adapter offers excellent durability and chemical resistance, even under constant exposure to moisture and UV radiation. Its flexible corrugation allows for a snug press-fit into ADS corrugated pipe while securely accepting 2" x 3" rectangular downspout connections.

Product Features

• ✅ Material: Injection-molded HDPE for corrosion and impact resistance
• ✅ Transition Capability: Connects standard 2" x 3" downspouts to 4" corrugated drain pipe
• ✅ Press-Fit Design: No need for fasteners or adhesives when properly installed
• ✅ Jobsite Durability: Maintains integrity during installation and backfilling
• ✅ Lightweight & Easy to Handle: Ideal for fast deployment in stormwater control applications

Technical Specifications

• Product Code: 331001
• Outlet Size: 4-inch corrugated pipe
• Inlet Size: 2" x 3" rectangular downspout
• Material: Corrugated high-density polyethylene (HDPE)
• Application: Downspout to drain pipe adapter

Installation Notes

This adapter is typically installed at the base of vertical roof drains to redirect water into a buried corrugated drain line. Ensure proper alignment with downspout and verify a clean connection into the corrugated pipe. No mechanical fasteners or sealant are required under standard conditions, but project-specific best practices should be followed as needed.

Common Applications

Frequently used in residential stormwater systems to mitigate runoff near building foundations. Also used in hardscape drainage installations, landscape beds, or gutter system extensions.

Additional Considerations

When specifying components for stormwater diversion, verify compatibility between downspout geometry and inlet dimensions. Use in conjunction with ADS N-12 or single-wall corrugated pipe for complete water redirection assemblies.

The 464 ADS Corr Adapt Downspout Adapter provides a practical, code-compliant solution for transitioning between roof runoff systems and ground-level drainage infrastructure. With its robust design and field-proven reliability, it is a trusted choice for contractors requiring efficient, high-volume water management components.