How terrain changes a leak
On flat ground, a leaking pipe tends to surface near where it breaks. On a slope, water follows gravity and soil layers, so a damp patch may appear well downhill from the leak, at a retaining wall, or at the base of a terrace. Homes in Golden Hills often sit on sloped or terraced lots with longer runs of pipe and more irrigation than a typical flat tract.
Homes in the neighborhood vary in age and construction, from mid-century houses to later custom homes, and foundations can differ on hillside lots. Check your own house's records rather than assuming.
Hillside leak sources
| Source | Where the water may show |
|---|---|
| Service line from the street | Along the driveway or at a lower terrace |
| Irrigation main and valves on slopes | Downhill soggy areas, erosion, wet walls |
| Lines to outdoor fixtures and hose bibs | At the base of retaining walls |
| Under-slab or crawlspace lines | Indoors, or seeping from the foundation edge |
| Pool or spa plumbing | Wet ground downhill of the equipment |
Checks suited to a hillside lot
- Meter test.Everything off, including irrigation and any pool auto-fill.
- Separate the irrigation.Close the irrigation supply and watch the meter. On hillside lots irrigation is a frequent source.
- Separate the house.Close the house main to tell a service line leak from an indoor one.
- Walk uphill from wet spots.Follow damp areas upward toward the likely pipe route.
- Watch walls and slopes.Note new seepage at weep holes, wall bases or eroded soil.
Contacts
- City of Fullerton water utility for meter and billing questions.
- The city for permits on line replacement or significant work on slopes.
- SoCalGas for gas service; leave and call 911 or SoCalGas from outside if you smell gas.
- A licensed plumber for detection, and a geotechnical or civil professional if slopes are moving.
Hillside terms
- Weep hole
- An opening near the base of a retaining wall that lets water drain out.
- Terrace
- A flat step cut into a slope, often planted and irrigated.
- Saturation
- Soil that is holding as much water as it can.
Common questions
Why is the wet spot so far from any pipe?
On slopes, water travels through soil and surfaces downhill. Follow it uphill and use valve checks to find the source.
Is water from a weep hole always a leak?
Not always. Weep holes drain irrigation and rain too. Water that flows when nothing is irrigating is worth checking.
Can a hidden leak affect a retaining wall?
Excess water behind a wall adds pressure and can cause problems. Find and stop the source, then have the wall looked at if you see damage.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.