Amazon.com: Camco Durable Sewer Cap with Hose Connection to Prevent Leaks, Easy Install and Simple Use (39463) Black 0.75 Inch : Automotive
RecPro RV Plumbing Hardware | 06860 | 1/2" Female End Cap Terminator | Drain Cap | Pex Pipe/Tubing Fittings (5 Fittings) - Amazon.com
CAMCO Medium 2-Pack 3-in Twist-It Sewer Hose Clamp - Sewer Cap with Hose Connection | Prevent Leaks, Easy Grey Water Tank Drainage | RV-Drain Valve Lock in the RV Accessories department at
4 inch RV Site Sewer Cap, Cast Metal, Lockable - RV Park Supplies
Zurn Pex QTC3F Fresh Water Fitting End Cap 1/2" MPT