Create Perfect-Fitting Downspout Connections

The MASC Adjustable Downspout Expander quickly expands the end of a downspout to create clean, overlapping connections without crimping or additional fittings.

Unlike fixed-diameter expanders, the MASC design provides ±1 mm of adjustment to compensate for slight variations in downspout diameters between manufacturers. This allows installers to fine-tune the expansion for a secure, precise fit.

• Expands downspout ends for clean, overlapping connections
• Adjustable ±1 mm to compensate for manufacturing tolerances
• Helps create a precise fit between downspout sections
• Eliminates the need to crimp the connecting end
• Works with common zinc, copper, aluminum, and stainless-steel downspouts
• Built as a professional, long-service-life gutter tool
• Useful for creating sliding sleeves
• Can also help align downspout elbows
• The adjustable expander is available in diameters of 76/80/100