Bottom Outlet Roof Drain with Overflow

The Thunderbird Products Bottom Outlet Roof Drain with Overflow is a professional-grade overflow roof drain designed to protect flat roofs from water damage during heavy rainfall and storm events. This dual-function roof drain outlet combines primary drainage with integrated overflow protection, ensuring your roofing system remains protected even when primary drains become clogged or overwhelmed.

Features

• Integrated Overflow Protection: The built-in overflow outlet provides critical secondary drainage when your primary roof outlet reaches capacity, preventing roof ponding and potential structural damage during severe weather.
• Heavy-Duty 20-Ounce Copper Construction: Constructed from thick 20-ounce seamless copper for superior durability and corrosion resistance. Copper outperforms plastic alternatives by resisting rust, melting, and cracking, ensuring decades of reliable performance.
• Seamless Flashing & Drain Basin: The seamless copper basin design eliminates weak points and prevents leaks. Sandblasted flashing provides excellent membrane adhesion for superior waterproofing performance.
• Dual Outlet Configuration: Features both a bottom outlet for primary drainage and a raised 2" overflow outlet for secondary water removal, providing comprehensive roof overflow protection.
• Multiple Size Options: Available in 2", 3", 4", and 6" drain sizes with bronze no-hub or threaded fittings to accommodate various drainage system requirements.
• Heavy-Duty ABS Cyclolac Dome Strainer: The included strainer effectively blocks leaves, debris, and pests from entering your drainage system, preventing clogs that could compromise your overflow roof drain performance.
• 10" Diameter Basin: Large basin area ensures efficient water collection and flow to both the primary roof drain outlet and overflow outlet.
• Made in the USA: Manufactured by Thunderbird Products in the United States, ensuring quality craftsmanship and reliable performance.

Applications

• Flat Roof Drainage Systems: Specifically engineered for flat roof applications where overflow protection is critical for building safety and code compliance. This overflow roof drain prevents water accumulation that could exceed roof load capacity during heavy rainfall and storm events..
• Storm Water Management: The dual-outlet design ensures continuous water removal even during heavy rainfall when primary drains may become temporarily overwhelmed, with the roof overflow system providing essential backup drainage.
• Building Code Compliance: Many building codes require secondary drainage or overflow outlets on flat roofs. This roof drain outlet meets commercial building standards for overflow protection.
• Commercial & Industrial Buildings: Ideal for warehouses, commercial properties, and industrial facilities where roof overflow protection is essential for protecting inventory, equipment, and building infrastructure.
• Versatile Installation Options: Includes choice of threaded adapter fittings or standard no-hub fittings for connection to PVC, cast iron, or other drainage pipes, with separate overflow outlet for secondary drainage routing.

The Thunderbird Products Bottom Outlet Roof Drain with Overflow delivers reliable dual-drainage protection with professional-grade copper construction and comprehensive overflow outlet coverage for maximum roof protection.

This item is also available without overflow; as well as in Stainless Steel, TPO Clad, and PVC Clad.

Note on Fittings: Two types of fittings are available. A threaded adapter fitting is used primarily with 2" PVC pipe applications. The threads on the bronze fittings are male and can be attached to a threaded female PVC adapter. A no-hub fitting is the standard fitting used in the industry. With this fitting, a rubber coupling is used to connect the drain to the drainage pipe.