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Fernco 4-in. Ideal Flexible Neoprene Coupling Fittings for Cast Iron Pipe - Quick and Simple Connection in the PVC Pipe & Fittings department at Lowes.com
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ADS 4-in x 4-in-Degree Corrugated Inside Coupling Fittings in the Corrugated Drainage Pipe Fittings department at Lowes.com
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Eastman 4-3/8 Inch Long Pattern Compression Coupling, 1 Inch IPS, Galvanized Steel, 20566 - Pipe Fittings - Amazon.com
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Fernco 1056-44 4-in. Flexible PVC Pipe Coupling for Cast Iron and Plastic Plumbing Connections, 2-Pack - Amazon.com
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Pipe Fittings Direct. 4 inch NPT mechant steel full coupling, Class 150, Internal Thread X Internal Thread
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