Sewer cleanout installation for Los Angeles homes that have no easy way in

A one-way cleanout points downstream, toward the street. It lets a plumber send a cable or jetter out to the city main, which covers most clogs. The limitation shows up when the blockage sits between the cleanout and the house, or when the camera needs to look back under the slab.

A two-way cleanout has two openings, one aimed toward the street and one aimed back toward the house. It costs a little more because the fitting is larger and needs a wider hole, but it gives full access in both directions. On most Los Angeles homes we recommend the two-way version, especially where the line under the house is old cast iron.

Some properties benefit from a second cleanout near the property line as well. That second point helps on long laterals, on lots where the line changes direction and on duplexes where two buildings share one lateral.

The best spot is within a few feet of the foundation, on the side where the sewer exits, and on a straight run rather than at a bend. We locate the line first, usually by sending a camera with a transmitter from inside so the path and depth are marked on the ground.

The riser should come up where it will stay accessible. That means out of a planter bed that will get mulched over, clear of the driveway apron where a car parks on it, and away from a spot that collects runoff. A cleanout that floods every time it rains lets stormwater into the sewer and can cause backups.

• Close to the foundation on the exit side
• On a straight section, not at a bend
• Above the finished grade with a sealed cap
• Clear of driveways, planters and drainage paths

The cheapest time to add a cleanout is when the pipe is already exposed. If you are scheduling a repair on the lateral or a full replacement, the dig at the foundation is already happening, so the extra fitting adds only a modest cost.

Cleanouts also turn a later inspection into a simple visit. A home buyer's inspector, an insurance adjuster or a plumber checking for roots can drop a camera in without disturbing the house. That access matters on older homes where root intrusion in clay pipe is likely to need attention again.

Keep the cap visible and loose enough to turn by hand with a wrench. Plastic caps can crack if a lawn mower or string trimmer hits them, so a small concrete or plastic box around the riser protects it in a lawn.

Do not pour anything into the cleanout to fix a slow drain, and never leave the cap off. An open cleanout lets sewer gas escape near the house and gives rats a direct route into the line. If you ever see water standing in the riser when you open it, the line is blocked downstream and needs a main line clearing before anything else drains into it.