The cleanout is always near the plumbing leading from your home to the tank. Head toward the tank in your yard, but check the area around your home. The cleanout will usually be next to your home. To find the septic tank, look for the vent pipes sticking out of the ground.,
If more than one of these drains is slow-moving, is gurgling, has a foul smell, or has water backing up, that is signs of a clogged sewer line. Slow-flowing water is an indication that your main sewer line may have become clogged.
How to get sewer maps. You can visit your local authority's offices to inspect their public sewer map, or you can order an asset location search from the water company in question (many of them offer this online through Digdat).
If you have a home that was built before 1978, you may not have a sewer line cleanout. Once you find the cleanout, screw off or pull off the cap. If the sewer water is flowing up and out of the pipe or standing in the pipe, this confirms you have a sewer line clog.
Use a metal detector – If your manhole is buried, it is normally quite shallow (just inches below the surface), so you could buy or loan a metal detector to locate your manhole. This is an effective way of checking your garden or tarmac for signs of entry.Aug 25, 2016