Installing a sewer cleanout

Post date: 2022-05-13 11:40:30

I want to scope my sewer line (to check its condition), but it has no cleanout. I do have exposed sewer line in my first floor laundry room, with the thicker line on the right coming down from the second floor bathroom, with a smaller horizontal drain coming from the washing machine and laundry sink. What's the best way to install a cleanout?

The vertical line on the left is for a vent. The washer and sink drain line is 2" and the main vertical sewer line is 3".

I did get a quote of $575 from a sewer scoping company for installing a cleanout in the vertical 3" line. That seems pricy, and doesn't look too hard to install myself.

My plan is to put the cleanout in the horizontal drain by installing a Y or a T with flexible couplings between the vent and main sewer line. I figure it's a better choice than the installing the cleanout in the main line as it's less messy to cut the drain, plus it only puts my washing machine and laundry sink out of commission and not a bathroom if things go wrong with the install (which is not unknown to happen with my plumbing work).

Is installing the cleanout in a 2" line reasonable over the 3" line? My questions are is 2" wide enough to pass though a scope or sewer rooter, and will a scope or rooter be able to make the downward turn from the horizontal drain to the vertical sewer?

Or should the cleanout be installed in the main sewer line?

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