Professional 2.5"x3.5" Plain Downspout
Commercial Grade Aluminum | Enhanced Capacity | 25+ Designer Colors
Trusted by GutterAll.com
Professional Gutter Installation & Supplies Since 2010
19759 SE Sunnyside Rd
Damascus, Oregon 97089
8ft: Nationwide | 10ft: Local Only
sales@gutterall.com
(503) 496-7017
COMMERCIAL GRADE ENHANCED CAPACITY DOWNSPOUT
46% more flow capacity than standard downspouts - handles up to 1,200 sq ft of roof area
Save Big with Contractor Direct Pricing - Professional Quality for Everyone!
⚠️ SHIPPING RESTRICTION: 10FT SECTIONS - LOCAL DELIVERY ONLY ⚠️
8ft sections available for nationwide shipping | 10ft sections: Damascus, OR area only

Commercial-Grade Enhanced Capacity Downspout System
Engineered for maximum water flow capacity in commercial and large residential applications, our Professional 2.5"x3.5" Plain Downspout delivers 46% more drainage capacity than standard downspouts. With 8.75 square inches of flow area, this premium aluminum downspout handles water from up to 1,200 square feet of roof area, making it essential for commercial buildings, large homes, and heavy rainfall regions.
Heavy-gauge aluminum with powder coating
8.75 sq in - 46% more than standard
Match any architectural style
8ft (ships nationwide) | 10ft (local only)
Professional Installation Diagram
Professional installation diagram showing proper bracket spacing and component placement for 2.5"x3.5" downspout system
Available Colors - 25+ Designer Options
White
Black
Musket Brown
Beaver Brown
Clay
Dark Bronze
Light Bronze
Royal Brown
Rustic Copper
Safari Beige
Tuxedo Gray
Wicker
Almond
Antique Ivory
Buckskin Brown
Classic Cream
Colonial Blue
Colonial Gray
Additional colors available including Colonial Red, Copper Metallic, Dove Gray, Forest Green, Heritage Cream, and more. Contact us for complete color samples.
Technical Specifications & Performance Data
Core Specifications
- Dimensions: 2.5" x 3.5" (nominal)
- Flow Area: 8.75 square inches
- Material: Commercial-grade aluminum
- Gauge: Heavy-duty construction
- Finish: Powder-coated UV-resistant
- Available Lengths: 8ft (ships) | 10ft (local only)
- Warranty: 10-year limited warranty
Performance Capabilities
- Roof Coverage: Up to 1,200 sq ft per downspout
- Flow Advantage: 46% more capacity than 2"x3"
- Bracket Spacing: Every 3 feet (heavy-duty required)
- Compatible Gutters: 6" and 7" commercial systems
- Weather Resistance: All-climate performance
- Service Life: 20+ years expected
- Applications: Commercial, large residential
CRITICAL SHIPPING & DELIVERY INFORMATION
SHIPPING RESTRICTIONS APPLY
8FT SECTIONS: Available for nationwide shipping via standard carriers. 10FT SECTIONS: LOCAL DELIVERY OR PICKUP ONLY due to carrier length restrictions. Damascus, OR area delivery available. Professional installation recommended for all commercial applications.
Contractor Direct Pricing - Commercial Quality for Everyone
8ft Section - Ships Nationwide
Wholesale Pricing Available
Perfect for: All locations nationwide
Standard shipping available
10ft Section - Local Delivery
Save on Shipping Costs
Perfect for: Damascus, OR area projects
Fewer seams, professional installation
Bulk Commercial Orders
Volume Discounts Available
Perfect for: Large commercial projects
Custom lengths and colors
Professional Installation
Full Service Available
Perfect for: Complete gutter systems
Licensed and insured contractors
Professional Installation Guide for 2.5"x3.5" Downspouts
Follow these professional techniques for optimal performance with commercial-grade downspout systems.
- Plan downspout locations based on roof area (max 1,200 sq ft per downspout)
- Install heavy-duty 2.5"x3.5" brackets every 3 feet along wall
- Connect appropriate adapter from gutter outlet to downspout
- Install top elbow and secure first downspout section
- Join additional sections using commercial-grade connectors
- Secure all sections to brackets with appropriate fasteners
- Install bottom elbow and extension to direct water away from foundation
- Test system with water to verify proper flow and connections
GutterAll Professional Performance Guarantee
Commercial-grade construction with 10-year limited warranty. These enhanced capacity downspouts provide superior water management for demanding applications. Trusted by commercial contractors and large residential builders for reliable performance in all weather conditions.
Professional Support & Pricing: (503) 496-7017
COMMERCIAL GRADE ENHANCED CAPACITY SYSTEM
Professional downspout solution for maximum water management
46% more flow capacity
Commercial-grade aluminum
25+ designer colors
Contractor direct pricing
CONTACT FOR WHOLESALE PRICING - COMMERCIAL PERFORMANCE
Commercial Downspout FAQ - All Objections Addressed
Why choose 2.5"x3.5" downspouts over standard 2"x3" downspouts?
The 2.5"x3.5" downspouts provide 8.75 square inches of flow area compared to 6 square inches for standard 2"x3" downspouts - that's 46% more capacity. This enhanced capacity handles water from up to 1,200 square feet of roof area versus 600-800 square feet for standard downspouts. For commercial buildings, large homes, or areas with heavy rainfall, this increased capacity prevents overflow and water damage.
Why are 10ft sections only available for local delivery?
Shipping carriers have length restrictions that make 10ft sections prone to damage during transit. The longer length increases the risk of bending, denting, or breaking during shipping. For customers outside our Damascus, OR delivery area, 8ft sections provide the same quality and performance while shipping safely nationwide. Local customers benefit from 10ft sections with fewer seams and professional delivery service.
Do I need special brackets for these larger downspouts?
Yes, 2.5"x3.5" downspouts require heavy-duty brackets specifically designed for this size. Standard 2"x3" brackets will not fit properly. Due to the larger size and increased water capacity, install brackets every 3 feet instead of the standard 4 feet. We offer matching heavy-duty brackets in all available colors. Professional installation ensures proper support and long-term performance.
Will these work with my existing 5" residential gutters?
These downspouts are designed primarily for 6" and 7" commercial gutters but can be adapted to 5" residential gutters using appropriate adapter fittings. However, the enhanced capacity of 2.5"x3.5" downspouts is best utilized with larger gutters that can deliver adequate water volume. For optimal performance, consider upgrading to 6" gutters when installing these enhanced capacity downspouts.
How do I determine if I need enhanced capacity downspouts?
Consider enhanced capacity downspouts for: commercial buildings, homes over 3,500 sq ft, areas with heavy rainfall (>40" annually), steep roof pitches, or if you've experienced overflow with standard downspouts. Each 2.5"x3.5" downspout handles up to 1,200 sq ft of roof area. For large structures or critical drainage applications, the enhanced capacity provides essential protection against water damage.
What's the difference between 8ft and 10ft sections in terms of performance?
Both lengths offer identical performance, material quality, and flow capacity. The 10ft sections provide fewer seams in your installation, which can improve appearance and reduce potential leak points. However, 8ft sections are easier to handle during installation and ship nationwide. Choose based on your location (local vs. distant) and installation preferences rather than performance differences.
Are these downspouts worth the premium price over standard sizes?
For appropriate applications, absolutely. The enhanced capacity prevents costly water damage, reduces the number of downspouts needed, and provides peace of mind during heavy rainfall. Commercial buildings and large homes require this capacity for proper water management. The premium construction and 10-year warranty ensure long-term value. Consider the cost of water damage versus the modest premium for enhanced capacity.
Can I install these myself or do I need a professional?
While the downspouts themselves can be cut and connected by experienced DIYers, professional installation is recommended for commercial applications and multi-story buildings. Proper bracket spacing, secure mounting, and integration with gutter systems requires expertise. Professional installation ensures warranty compliance, building code adherence, and optimal performance. We can recommend qualified contractors in your area.
What colors are available and how do I choose?
We offer 25+ designer colors including popular options like White, Black, Dark Bronze, and various browns and grays. Choose colors that complement your building's exterior and match your gutter system. For commercial applications, neutral colors like White, Black, or Bronze are most popular. We can provide color samples for large orders to ensure perfect matching with your architectural design.
What's your return policy for these commercial-grade products?
We offer a 30-day return policy on unopened packages in original packaging. Due to the specialized nature of commercial products, a 15% restocking fee applies to returns. Buyer is responsible for return shipping costs. For defective products, we provide immediate replacement. Large commercial orders have special return arrangements - contact us before ordering to discuss specific requirements.
How do I place a large commercial order?
Contact us directly at (503) 496-7017 for commercial project pricing and coordination. We offer volume discounts, custom delivery scheduling, and technical support for large orders. Our commercial team can help with material calculations, color coordination, and integration with other gutter system components. We work with contractors, architects, and building owners to ensure successful project completion.
Shipping & Delivery Options
8ft Sections - Nationwide Shipping
- Standard Shipping: 5-7 business days
- Expedited Shipping: 2-3 business days
- Freight Shipping: Available for large orders
- Packaging: Professional protective packaging
- Tracking: Full tracking provided
Available to: All 50 states
10ft Sections - Local Delivery Only
- Local Delivery: Damascus, OR area
- Delivery Time: 2-4 business days
- Delivery Radius: 50-mile radius
- Professional Handling: Careful transport
- Scheduling: Flexible delivery windows
Service Area: Portland metro, Damascus, Gresham, Happy Valley
Pickup Options
- Location: 19759 SE Sunnyside Rd, Damascus, OR
- Hours: Monday-Saturday 8:00 AM - 4:00 PM
- Preparation Time: 2-4 business days
- Loading Assistance: Available
- Advance Notice: Call ahead recommended
Benefits: No shipping costs, immediate availability