This PVC fitting is used to plug 1 1/2" female PVC slip fittings   It should be attached using PVC primer and cement, which is available at your local hardware store   It is made out of white PVC plastic

This is a 1" PVC plug   It is used to plug a 1" female PVC fitting and should be attached using PVC cement and PVC primer   This will usually be used when a fitting has multiple openings, and not all of the openings are being used

Plug, PVC, 1/2" Spig