Pipe Bursting in Laguna Niguel

A planned city on the hills

Laguna Niguel has almost no old housing. The first tracts went in during the 1960s and early 1970s along Crown Valley Parkway and in the neighborhoods near the Laguna Niguel Regional Park, built slab-on-grade with cast iron under the house and clay or early ABS to the street. The bulk of the city, from the slopes above Alicia Parkway to the ridges toward Aliso Viejo and the coast side toward Monarch Beach, was built from the late 1970s through the 1990s on ABS and then PVC laterals, almost all under homeowners associations. The city incorporated in 1989, after most of it was already built, and a few newer pockets have gone in since on modern PVC.

So the failure list is different from the older cities on the flats. There is little clay and little root intrusion at joints. Instead the camera finds cast iron channeled along the bottom under the earliest slabs, ABS cracked at glued fittings and crushed under widened driveways, and above all bellies and sheared joints where the lateral leaves the compacted building pad and crosses fill that has settled.

Cut, fill and expansive soil

Every tract in Laguna Niguel was graded, which means half of each street sits on cut and half on fill. The fill was compacted when it was placed but it still settles over decades, and it creeps on the steeper slopes. A lateral that runs straight and true through the cut side of a lot will show a dip and a cracked joint where it crosses onto the fill. The native soil is expansive clay and siltstone that swells in the winter rains and shrinks all summer, and that cycle works on every fitting in a plastic line. Add the city's landscape trees, mostly eucalyptus, pine and pepper trees planted with the tracts and now mature, and the few open joints that exist get roots fast.

Sewers and permits

Laguna Niguel does not run its own sewers. The Moulton Niguel Water District operates the local collection system across the city, and the lateral from the house to the connection at the district main is the property owner's responsibility, including the part under the parkway and sidewalk. Lateral repair or replacement needs a plumbing permit from the City of Laguna Niguel, anything in the sidewalk, parkway or street needs an encroachment permit and an inspection before the pit is closed, and in most neighborhoods the HOA must approve any work that touches the surface it controls. The contractor should handle all of it and say so in the quote.

Which trenchless method fits a Laguna Niguel lateral

• Sewer pipe lining fits channeled cast iron under an early slab, cracked ABS that still holds its shape and slope, and any line with a few bad fittings spread along its length. A cured-in-place liner from the cleanout seals every joint and crack in one pass without breaking the floor or opening the driveway.
• Pipe bursting fits a sheared joint or a deep belly in settled fill, a crushed section, or a line that needs to be upsized. Two small pits and a new fused polyethylene pipe on the old alignment, which is the only trenchless method that also fixes slope.
• Sectional point repair handles one crushed section under a driveway or one failed fitting on an otherwise sound line.

Crews that handle trenchless sewer repair in Laguna Niguel read hillside footage every week, and a good one will tell you from the camera whether your problem is the pipe or the ground under it before quoting a method.

What the job looks like

A camera inspection maps the line and marks every defect on the ground with its depth, which on a hillside lot also tells the crew where the fill line is. Hydro jetting clears scale, grease and any roots so the pipe wall can be seen and, if the line is being lined, so the resin bonds to clean pipe. Lining runs from the cleanout at the house; bursting needs a small pit at each end of the run. Most residential jobs finish in a day, with water off for a few hours during a liner cure, and you should receive the before-and-after footage. For what the technician is looking for on the monitor, see what the inspection video reveals.

To compare installers who have been checked for licensing and CIPP training, you can find a verified CIPP contractor through an independent directory.

Pipe Bursting in Laguna Niguel

How pipe bursting works

A steel cable is threaded through the old sewer line from a pit at one end to a pit at the other. A cone-shaped bursting head, with new high-density polyethylene pipe fused to it, is pulled through by a hydraulic unit. The head splits the old clay or cast iron outward into the soil and the new pipe follows in the same alignment at the same depth. The result is a single fused length of pipe with no joints for roots to find.

When bursting is the right call

• Collapsed sections — a liner needs a host pipe to hold its shape; a collapsed run has none.
• Bellies — a low spot that holds water stays a low spot after lining. Bursting lays new pipe on a fresh bed.
• Undersized lines — bursting can upsize a 3-inch lateral to 4 inches; lining slightly reduces diameter.
• Badly deformed pipe — Orangeburg that has flattened, or cast iron with most of its bottom gone.

What the job looks like

One pit at the house or cleanout, one at the property line or the street connection, each a few feet square. Utilities that cross within a foot or two of the sewer path are located and potholed first. The pull takes an hour or two; the whole job, including fusing, connections, inspection and backfill, is usually one day.

Permits and the street

If the downstream pit is in the sidewalk, parkway or street, a right-of-way permit and restoration to city standards are required in addition to the plumbing permit. If the connection at the main is replaced, the city inspects it before the pit closes. Confirm who is handling this before work starts.

ZIP codes served in Laguna Niguel

Pipe Bursting is available throughout Laguna Niguel, including ZIP codes 92607, 92677.

More trenchless services in Laguna Niguel

Questions we hear in Laguna Niguel