Cleanouts are fittings that attach to sinks and other plumbing fixtures to allow access to the drains without removing the whole fixture. It seems like we only pay attention to our drains when there’s a problem, and cleanout plugs are notoriously difficult to remove. Stuck drain cleanout plugs can ideally be removed with some WD-40 and a wrench, but often you have to use a chisel and a ball peen hammer or even break the plug into pieces to take it off.
This Eureka Cleanout Plug Wrench from Pasco (pictured above) is made of high carbon steel and includes tapered thread taps. Cleanout plug wrenches, also called drum tap wrenches, run about $12 from Amazon, and should make a difficult job a little easier.