Move serious water and protect high-value structures with this Extra Large Aluminum Gutter Leader Head – an oversized collection box engineered for big roofs, commercial buildings, and any location where multiple gutters or scuppers dump into a single downspout. The extra large body (W 15.5" x H 13" x D 8") delivers far more internal volume than standard leader heads, giving your system the surge capacity it needs when heavy storms hit.

This XL collection box is designed to sit at major convergence points so it can capture water from long roof runs, multiple gutter lines, or flat-roof scuppers and funnel it cleanly into the downspout instead of overloading the gutter edge. The generous internal volume acts like a built-in buffer tank during peak rainfall, helping prevent backup, gutter overflow, fascia saturation, siding streaks, and foundation washout that happen when undersized boxes choke the flow.

Constructed from professional-grade aluminum with a factory-applied baked-on color finish, it delivers commercial-ready durability without rust, flaking paint, or the cracking and warping issues common with plastic. You can choose from 25+ standard gutter industry colors to match existing gutters, tie into trim, or use the box itself as a bold architectural accent on warehouses, offices, large custom homes, and institutional buildings.

The classic tapered leader-head design pairs all that capacity with a timeless architectural look that actually fits the scale of larger walls and rooflines. On big projects, the extra large size looks intentional and proportional at each downspout location instead of disappearing like a small residential box, so your drainage components read as part of the design, not an afterthought.

Use this extra large leader head anywhere capacity and protection are non‑negotiable: commercial roofs, long multi-story runs, large custom homes with complex rooflines, rainwater harvesting and storage tank feeds, agricultural or industrial structures, and multi-family buildings with shared drainage. Also known as a conductor head, collection box, scupper box, collector head, or downspout collector, it delivers maximum-volume water handling plus the architectural presence you expect on serious projects.