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The TIGRE USA INC 36-654 is a PVC downspout adapter designed to connect rain gutter downspouts to underground sewer drain piping. This fitting transitions from a rectangular or round downspout outlet to a standard sewer drain pipe, keeping stormwater directed away from foundations and into subsurface drainage systems. The adapter measures 3 inches by 4 inches by 4 inches and is constructed from PVC, making it resistant to corrosion and chemical degradation common in sewer drain environments. Licensed plumbers and drainage contractors install this fitting as part of site drainage and stormwater management systems.
This adapter is suited for residential and light commercial applications where roof drainage downspouts must tie into underground sewer or storm drain lines. It is commonly used at the base of a downspout where the above-grade gutter system terminates and below-grade piping begins. The 3 inch by 4 inch by 4 inch configuration accommodates standard downspout outlet sizes and aligns with common underground drain pipe diameters. This unit is sold individually; package quantity is 25 units per case for contractor stocking.
Designed as an OEM-style replacement and standard-fit adapter for PVC sewer drain and stormwater downspout systems using 3 inch by 4 inch by 4 inch connection geometry.
Installation is typically performed by a licensed plumber or drainage contractor in accordance with local plumbing codes and applicable IPC guidelines. Shut off or redirect any active water flow from the gutter system before beginning work. Solvent-weld connections require proper PVC primer and cement applied per manufacturer and code requirements. Confirm local jurisdiction requirements for connecting roof drainage to sanitary versus storm sewer lines before final tie-in.
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