With all the different pipe ... made with PVC or ABS plastic. Plastic drain fittings are usually glued, but the ones you might need to remove temporarily, like cleanout plugs, are threaded.

I need to replace the end cap on a PVC pipe. The current cap is just a standard PVC cap that I can find at Home Depot for 50 cents. However, none of them have 1/4" threaded holes. I am not ...