External Snap End Cap for 4" & 6" Corrugated Drain Pipe Catalog Drainage External Snap End Cap for 4" & 6" Corrugated Drain Pipe Description ADS ARC18 Leachfield / PVC Sewer & Drain / Schedule 40 / Platon Waterproofing Membrane / Form-a-Drain Foundation Footing System External Snap End Cap 6562466 - 4" Cap6CAP - 6" CapView Form-A-Drain Contractor Handbook Rates Please contact us for current pricing and availability. Request Availability