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FLEX Drain by Amerimax 4-in x 4-in-Degree Corrugated Coupling Fittings in the Corrugated Drainage Pipe Fittings department at Lowes.com
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Amazon.com: Polylok 4" Corrugated Pipe Adapter (4" corrugated to 4" SDR 35 or 4" SCH 40) : Industrial & Scientific
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Amazon.com: Polylok 4" Corrugated Pipe Adapter (4" corrugated to 4" SDR 35 or 4" SCH 40) : Industrial & Scientific
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ADS 6-in x 6-in Corrugated Snap Coupler Fittings in the Corrugated Drainage Pipe Fittings department at Lowes.com
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