Coupler for 4" Schedule 40 Pipe Catalog Drainage Coupler for 4" Schedule 40 Pipe Description ADS ARC18 Leachfield / ADS Corrugated Pipe / PVC Sewer & Drain / Platon Waterproofing Membrane / Form-a-Drain Foundation Footing System Coupler 6156830View Form-A-Drain Contractor Handbook Rates Please contact us for current pricing and availability. Request Availability