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Whittier, CA · Leak detection

Leak Detection in Whittier, CA

A water bill that jumped for no reason, damp spots on a wall or ceiling, a warm patch on the floor, or the sound of running water when everything's off? Those can be signs of a hidden leak. Call, describe what you're noticing, and get connected with a local plumbing contractor to find the leak and fix it.

Call (562) 273-9788 Signs of a leak
  • One call to get started
  • Hidden & slab leaks
  • Locate · then repair
A plumber crouched beside a stucco wall, turning the lever of a brass shutoff valve on a copper pipe while holding a flashlight.

Water visibly leaking?

Shut off the water at the fixture or the main shutoff, then call.

Hidden leaks

Signs of a hidden water leak

Most leaks inside walls, ceilings or under a slab aren't seen until they've been running for a while. These are the signs to watch for.

  • A water bill that jumps

    A higher bill without a change in how much water you use.

  • Running water when nothing's on

    A hiss or the sound of water moving with every tap and appliance off.

  • Damp spots or stains

    Water stains, bubbling paint or soft drywall on walls or ceilings.

  • A musty smell or mold

    A persistent musty odor or mold growth, especially in one area.

  • A warm spot on the floor

    A warm patch on a slab floor can point to a leaking hot water line underneath.

  • The water meter keeps moving

    The meter's flow indicator turning while all water use is off.

Noticing one or more of these? Describe what you're seeing and where. That's enough to get started.

Call (562) 273-9788

Leak detection

Finding the leak before opening walls or floors

The point of leak detection is to pinpoint the source first, so any opening of a wall, ceiling or floor is small and in the right place.

Why locating comes first

  • Less drywall, flooring or slab to open up
  • The repair goes where the leak actually is
  • It confirms whether there's a leak at all, and on which line

What leak detection can involve

  • Isolating lines to narrow down which one is leaking
  • Pressure-testing the plumbing
  • Listening for the leak and checking for moisture or heat

Think there's a leak you can't see? Call and describe the signs.

Call about a hidden leak

Where leaks hide

Common places hidden leaks start

Where the leak is shapes how it's found and what the repair involves.

  • Under the slab

    Water lines running under a concrete slab floor. Warm spots, cracks or damp flooring can be signs.

    Slab leaks

  • Inside walls and ceilings

    Supply lines and drain lines behind drywall, often showing up as stains or soft spots.

  • Under sinks and behind fixtures

    Supply connections, shutoff valves and drain fittings under sinks and behind toilets.

  • At the water heater

    Connections, valves or the tank itself. A leaking tank usually means replacement.

    Water heater repair or replacement

Slab leaks

Slab leak detection and repair

Many homes have water lines running under a concrete slab. When one of those lines leaks, the water can go unnoticed until it shows up as a warm floor, damp flooring, cracks, or a water bill that won't come down.

  • A warm spot on the floor
  • Damp or lifting flooring
  • New cracks in flooring or the slab
  • Running-water sounds near the floor

Once a slab leak is found

  • Spot repair: opening the slab at the leak to repair that section.
  • Rerouting: running a new line around the slab, through walls or the attic, instead of opening the floor.

Which makes sense depends on where the leak is and the condition of the rest of the line.

Questions

Leak detection in Whittier: FAQ

Short answers about hidden leaks, slab leaks and what happens once a leak is found. Anything else, call and ask.

Suspect a leak? Describe what you're noticing. You don't need to know where it is first.

Call (562) 273-9788
How can I tell if I have a hidden water leak?

Watch for a water bill that rises without explanation, the sound of running water with everything off, damp spots or stains, a musty smell, or a warm spot on the floor. With all water use off, a moving flow indicator on the water meter is another sign.

What is a slab leak?

A leak in a water line that runs under a concrete slab floor. Because it's under the floor, it's often noticed through a warm spot, damp flooring, cracks or a higher water bill rather than visible water.

Will walls or floors have to be opened to find the leak?

The goal of leak detection is to pinpoint the source first, so that any opening needed for the repair is small and in the right place, rather than searching by opening several areas.

What happens after the leak is found?

The leaking section is repaired. For a slab leak, that can mean a spot repair through the slab or rerouting the line around it. Which fits depends on the location and the condition of the pipe.

My water heater is leaking. Is that a hidden leak?

Usually it's visible at the unit. A leak from a fitting or valve may be repairable; water from the tank itself usually means the tank is failing. Water heater repair or replacement

Reviewed September 2026

Think you have a hidden leak?
Find it before it spreads.

Call and describe what you're noticing and where.

Call (562) 273-9788