ADS 4-in x 4-in-Degree Corrugated Inside Coupling Fittings in the Corrugated Drainage Pipe Fittings department at Lowes.com
Wavincoil Land Drain Pipe Coil 100mm x 25m | Travis Perkins
Corrugated vs PVC Pipe for Exterior and French Drains - Home Fixated
FLEX Drain by Amerimax 4-in x 3-in-Degree Corrugated Coupling Fittings in the Corrugated Drainage Pipe Fittings department at Lowes.com
4 in. Corrugated Pipe Adapter to 4 in. PVC
2" Low Profile Shower Drain with 2" x 1-1/2" Reducer Pipe Fitting and Perforated Strainer- PVC Side Outlet Drain Assembly for Replacement Shower Base and Drain - Amazon.com