As someone who works in the industrial and scientific field, I have gone through several cleanout plugs before finding this one. Through trial and error, I found that the Oatey brass cleanout in 4 inches offers easy installation and, most importantly, no leaks, making it a reliable choice. The durability of the brass also ensures that it will last for a long time - a definite pro! The only con is that it is slightly on the pricey side but it is definitely worth the investment for a hassle-free experience..