In our questions for a plumber, one of the questions is, "Do you know where the cleanout for your main house drain is?"
A "cleanout" is a convenient place for a plumber to get access to the drain to "clean out" a clog without having to resort to digging up your yard to fix the problem.
Recently, I was called out by a customer with a clog. There was no clean out, so the only way to get access to it was to dig up his yard and break into the drain pipe. Rather than just replace the sectionClick here to read more.