Emergency Leak Detection in Loma Linda, CA

My meter keeps moving but I see no water: what is going on?

When every faucet, appliance, and sprinkler valve is off and the meter dial or small flow triangle still turns, water is leaving the pipes somewhere out of sight. The EPA suggests reading the meter, using no water for two hours, then reading it again. If the number changed, you very likely have a leak.

A bill that jumped with no change in how your household lives points the same way. The EPA says average household leaks waste more than 9,300 gallons a year, and a tiny drip you never notice can be a large share of that.

A quick split test narrows the search. Close the main valve at the house and watch the meter. If it still moves, the loss is in the buried line between the meter and the house, or on the city side. If it stops, the leak is in the plumbing inside your property, and the search can start at the fixtures.

Toilets are a good first stop. A flapper that does not seal lets water trickle into the bowl all day, and a few drops of food coloring in the tank will show color in the bowl within about fifteen minutes if it is leaking.

Loma Linda pumps all of its water from city-owned wells in the Bunker Hill Basin, and the city runs an annual AWWA water loss audit on its own mains. Its 2024 audit says loss ran between 5 and 14 percent of production from 2021 to 2024, and the real-loss standard due in 2028 is not yet met.

That audit covers the pipes under the street. Water lost after your meter is on your side, which is exactly where a leak survey helps.

If you want to ask the city about a meter read or a bill, the Finance Department answers at (909) 799-2845, Monday through Thursday, 7:00 to 5:30. Have your meter reading and the dates of your last two bills ready before you call.

A stain on the ceiling or a soft spot in the wall

Ceiling and wall leaks are the ones people notice first, because the damage appears on a surface you look at every day. The stain is usually not where the pipe is. Water travels along framing, pipe sleeves, and the top of drywall before it shows, so the wet spot can sit several feet from the source.

The pattern tells a lot. A brown ring that grows only after someone showers points at a drain, a tub trap, or a shower pan. A stain that grows while the house is empty points at a pressurized supply line, which leaks around the clock. A hollow, spongy patch low on a wall often means a slow leak at a valve or a supply connection behind a sink.

A moisture meter reads how wet the surface is, and a thermal camera shows cool, wet areas that do not match the rest of the wall. Listening gear can then pick up the sound of water escaping a pressurized line, which narrows the spot to a small area. The plumber usually opens a small inspection cut instead of removing a whole section of drywall, and that cut is easy to patch.

Photograph the stain with a coin or tape measure beside it today and again in a day or two. Photos show whether it is growing, and they back up an insurance claim if the damage is sudden.

Under the house and in the crawlspace

Some homes have a raised floor with a crawlspace beneath, and a leak there can run for months before anything shows indoors. Supply lines, drain lines, and the water heater feed all pass through that space. A leak can soak insulation and subfloor out of sight, which is why a damp crawlspace deserves attention even when the rooms above look fine.

Signs include a musty smell from floor vents, floorboards that bounce or buckle, insulation sagging between joists, and white mineral crust on the foundation wall. Standing water or a wet patch of soil under one run of pipe is a strong clue. Rodent activity and dust can mask a slow drip, so a look with a flashlight is not always enough.

Do not crawl in alone if there is standing water near wiring. Crawlspaces hold electrical lines, and wet ground and live current are a poor mix. The plumber can shut off and pressure test one section of pipe at a time, which isolates the leaking run without cutting into the floor above.

Drain leaks under a house are a different job from supply leaks. A cracked drain line often needs a sewer camera inspection to confirm where the pipe is broken, because it leaks only when water is draining and the ground may stay dry between uses.

Buried line leaks between the meter and the house

The pipe that carries water from the meter to your house is buried, and when it leaks, the first sign may be a bill, a soggy strip of yard, or pressure that sags at every tap. Soil hides the loss, and a leak can soak the ground for a long time without breaking the surface. Watch for sunken pavers, a crack that widens along a walkway, or a dark line in the lawn.

Finding the spot starts with the meter test above. If the meter runs with the house valve closed, the leak is outside. A plumber can then pressure test the line, trace its path with a locator, and use ground-listening gear to hear where water is escaping. A short, confirmed excavation fixes the leak, and when the whole line is worn, a water service line repair may cover replacing it.

Who owns what matters here. The state's plumbing contractor classification covers water lines from the owner's side of the utility meter to the structure, so that run is the homeowner's to fix. If water is bubbling up in the street or at the meter box on the city's side, call the city's after-hours water, sewer, and street emergency line at (909) 356-3805. That number is for the street side only. For anything between the meter and your house, call us.

Sprinklers, pools, and the meter box

Sprinkler and drip lines

The nearest long-record NOAA station, in Redlands, shows about 12.87 inches of rain a year in its 1991 to 2020 normals. June through September get near 0.1 inch a month, with roughly 25 days at 100 degrees or higher.

Irrigation runs hard through those months, so a stuck valve or a broken head hides inside normal watering. Run each zone one at a time with the house water off and watch the meter, and any zone that moves it by itself is the one to inspect.

Pool and spa lines

Pools lose water to evaporation, so a bucket test comes first. If the pool still drops faster than the bucket, the plumbing lines to the pump, filter, and spa can be pressure tested for leaks. A cracked shell or worn liner belongs to a pool contractor, and a plumber will tell you plainly which side of that line the problem is on.

Yard and meter-box leaks

Water pooling in the meter box or soaking the soil beside it needs a quick look at which side of the meter is wet. Do not dig around the box yourself. A leak before the meter is the city's to repair, and a leak after it is a household repair that a plumber can locate and fix.

Ways a leak gets located

Most jobs use two or three of these together. The meter test points the plumber inside or outside the house, the acoustic and moisture tools narrow the area, and a pressure test confirms the line before anyone cuts or digs. That order keeps the opening small, and it keeps you from paying to repair the wrong pipe.

Once the leak is found, repair depends on where it sits. An accessible line can often be fixed during the same visit when parts are on hand. A leak under concrete is a slab leak repair job, and a split in a pressurized run may be handled as burst pipe repair. When leaks keep showing up in different places, a planned repiping job is worth a conversation.

Questions about leak detection in Loma Linda