Sewer clean out location question
I had some problems with my drain in January and eventually found my clean out under 10 inches of dirt and mulch. Thanks, speedball1, for advice for the cover.
Now my neighbor is trying to find her clean out. (She has had some drain issues in the past and the plumbers have told her they aren't sure which direction her drain goes without putting a hole in the walls.) Her unit has a different design and is a two-story townhouse-type with an attached garage. What are the specifics for where the clean out is likely to be? She has a 6 foot patio in a direct line from her toilets and roof vent before you get to a small garden bed, and a garage/driveway in a general direction from the vent, toilets and outside faucet. We've dug some in the patio flower bed down about 10 inches, but nothing. We're starting digging alongside the driveway, but mulch and plants are in the way, and belong to other people. We could dig them up and replant them afterwards, but would rather not if it's not necessary. Is there any archive of records where this is likely to be? (I've been asking others with the same unit if they know where their clean out is and no one I've asked knows.)
Any ideas or opinions gratefully appreciated.
~Shawna