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The TIGRE USA INC 36-648 is an offset flush fit downspout adapter designed to transition rain gutter downspouts to underground sewer piping. It accommodates a three-way dimensional fit at 2 inches, 3 inches, and 4 inches, allowing it to bridge the size difference commonly found between residential and light commercial gutter outlet openings and buried drain lines. This adapter installs at the base of a downspout where it meets grade level, providing a clean, flush connection that directs roof runoff away from the foundation and into the underground drainage system. Plumbers and drainage contractors are the typical installers for this type of fitting.
The 36-648 is suited for residential and light commercial applications where downspout drainage must be channeled into an underground storm sewer or French drain system. The offset flush fit design accommodates installations where the downspout outlet and the underground pipe entry point are not perfectly in-line, making it useful in retrofit and new construction scenarios alike. It is sold in a package quantity of 10 units, making it practical for multi-unit or multi-downspout jobs.
Designed as an OEM-style replacement and standard fitting for residential and light commercial rain gutter downspout-to-underground-sewer connections where 2-inch, 3-inch, or 4-inch pipe interfaces are required.
Installation is typically performed by a licensed plumber or drainage contractor in accordance with local plumbing and stormwater codes. Shut off or divert water flow from the gutter system before beginning work. Ensure the underground pipe is properly bedded and aligned before seating the adapter to avoid stress on the fitting. Follow local IPC or applicable stormwater drainage code requirements for underground connections.
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