3x4 to 3 Inch Downspout Adapter – 30 Gauge Aluminum Gutter Size Reducer – Connects 3x4 Rectangular Downspout to 3" Rectangular Downspout – 25+ Colors – Professional Grade Wicker

Step down from a 3x4 downspout to a 3" downspout without cobbling together mismatched pieces. This aluminum downspout adapter creates a clean, professional transition between common gutter sizes while keeping water moving away from the home.The top opening is sized for a standard 3x4 rectangular K‑style downspout. The lower opening fits a 3" rectangular downspout section. The tapered body manages the size reduction gradually, helping maintain smooth water flow through the transition instead of creating a sudden bottleneck.Made from 30 gauge professional‑grade aluminum, the adapter is strong, light, and corrosion‑resistant. Reinforced edges add stiffness so the piece holds its shape during installation and long‑term use. Unlike vinyl or generic plastic reducers that fade, crack, and loosen over time, aluminum stands up to UV, temperature swings, and job‑site impacts for years of service.With more than 25 factory‑painted color options available, the adapter can be matched to existing gutters and downspouts so the size change blends into the system. Use it to connect new 3x4 downspouts into older 3" downspout runs, step down near decks or walkways where space is limited, or wherever a professional‑looking reduction is needed.Installation is straightforward: slide the 3x4 downspout into the upper end, insert the 3" downspout into the lower end, then secure both connections with sheet‑metal screws and an exterior‑grade sealant. Once installed, the adapter becomes a permanent part of the gutter system, helping route roof water where it needs to go while preserving the finished look of the home.Material: 30 gauge aluminum. Input: 3x4 rectangular downspout. Output: 3" rectangular downspout. Finish: factory‑painted in 25+ gutter colors. Application: gutter downspout size transition for residential and light commercial K‑style systems.

• ✓ CONNECTS 3X4 TO 3" GUTTER DOWNSPOUTS: Creates a clean transition from 3x4 rectangular K‑style downspout to 3" rectangular downspout. Ideal when tying new gutters into existing 3" downspout runs or tight clearance areas.
• ✓ ALUMINUM – PRO GRADE: Formed from professional‑grade 30 gauge aluminum with reinforced edges for strength. One‑piece tapered body maintains flow while stepping down to 3" size.
• ✓ 25+ COLOR OPTIONS FOR SEAMLESS LOOK: Available in more than 25 factory‑painted gutter colors so the transition blends into the downspout instead of looking like a plastic plumbing part.
• ✓ SMOOTH TAPERED TRANSITION: Interior taper is engineered for smooth flow and reduced turbulence, helping move roof run‑off efficiently through the reduction without creating splash‑back at the joint.
• ✓ FAST INSTALLATION WITH BASIC TOOLS: Top end fits 3x4 downspout, bottom fits 3" rectangular downspout. Attach with sheet‑metal screws and exterior sealant. Works for new gutter installs, remodels, and repairs.