EZ-FLO 15336, White PVC Cleanout with Brass Plug, 3 x 4-Inch, 3 inch x 4 inch

EZ-FLO 3 x 4 Inch PVC Cleanout with Brass Plug for Tubular Drain Applications, White, 15336

Camco RhinoFLEX 6-in-1 RV Sewer Wrench | Compatible with 3-Inch and 4-Inch Male or Female Sewer Clean-out Plugs, Slotted or Flush Sewer Plugs, and All 4-in-1 Adapters (39755)

Eastman 4 Inch Cast Brass Cleanout Plug, Countersunk Design for Flush Fit, 42035