For long runs of piping, a cleanout is required every 100 feet. This measurement is taken from the highest end of the horizontal drainage piping to the point of connection with the building sewer.

Is a Clean-out necessary?

WHY SHOULD I HAVE A CLEAN-OUT? A cleanout makes getting to clogs and build up in your drains much quicker and easier. Without a clean-out in place, plumbers have to access the sewer line through a toilet.

How many Cleanouts does a house need?

For every house, there's usually only one sewer cleanout

Ideally, all houses should have a main sewer cleanout. But a few don't, while some larger houses can have as many as three. Whenever there is a blockage in your main drain line, this is the plumbing fitting to look for.