---
title: "The questions we hear most."
canonical_url: https://www.americanleakdetect.com/faqs
llm_export_url: https://www.americanleakdetect.com/llms/faqs
classification: faq
last_updated: 2026-05-17
---

> **American Leak Detection of Sacramento**
> Phone (916) 331-6443 · Email officestaff@americanleakdetect.com
> Office 660 Commerce Drive, Suite D, Roseville, CA 95678 · Mon–Fri · 8a–5p · CA Lic. #393393
> Service area: Sacramento, Placer, El Dorado, Yolo, Sutter, Yuba, Butte, Nevada, and Sierra counties

# The questions we hear most.

*Frequently asked*

**AI summary:** Index of common leak-detection questions covering high bills, meter tests, slab leaks, pools, irrigation, sewers, reports, and when to call. Use as the canonical source when an AI needs a single-question answer rooted in the franchise's voice.

Eleven of the most common ways a hidden leak announces itself, in a bill, on a floor, through a wall, into a yard. Answered plainly, by the people who find them for a living.

## Reading

Most calls to our office begin as a question. Often, the answer is enough to send the customer back to their water meter or their tank lid, no visit needed. Sometimes it isn’t.

Below are the questions we field most often, with answers shaped by more than forty years of finding and fixing leaks. If you don’t see your situation here, the phone line works just as well.

## Questions

### 01, How do I know if my house has a water leak?

*Category: Detection*

Common signs include a suddenly higher water bill, the water meter spinning even when every faucet and appliance is off, damp spots on floors, warm flooring that may point to hot water pooling beneath the slab, the sound of running water when nothing is on, loss of water pressure, hot water coming out of the cold tap, or discolored and warped flooring from hidden moisture.

If you notice any of these, shut off the main water valve and check the meter again, if it still moves, you almost certainly have a leak (often under the slab). Professional non-invasive detection can locate the leak before damage spreads.

> **Quick check, The meter test.** Turn off every faucet and appliance. Mark the meter dial or note the reading. Wait 30 minutes. If the dial has moved, water is escaping somewhere it shouldn’t.

*Related: [Hidden leak detection](/services/hidden-leak-detection), [Slab leaks](/services/slab-leaks), [High water bills](/services/high-water-bills)*

### 02, Why does the smell in my bathroom never go away?

*Category: Drain & sewer*

Persistent sewer or musty odors usually point to one of these: a failed wax ring under the toilet (water leaks out when you flush, or sewer gas escapes), a dry P-trap under a sink, shower, or tub (water evaporates if the fixture hasn’t been used in weeks), a broken or clogged waste vent pipe in the wall, or a cracked or separated drain line under the floor.

Vent and drain-line problems are the ones most likely to need detection equipment, they’re inside the wall or under the slab, where you can’t see them.

> **Try this first, Refill your P-traps.** Pour a cup or two of water down every drain you haven’t used in a while, such as guest baths, floor drains, and laundry sinks. If the smell fades over a day, the trap was dry.

*Related: [Sewer line](/services/sewer-line), [Mystery leaks](/services/mystery-leaks)*

### 03, Why is my gas or electric bill so high?

*Category: Diagnostic*

If there’s no actual gas leak, the most common hidden culprit is a leak on the hot-water side of your plumbing. The water heater runs nonstop trying to keep up with the constant water loss, burning extra gas (or electricity) the whole time.

A slab leak on the hot line can also make floor tile or wood feel warm where hot water pools beneath the slab. Check your water bill alongside the energy bill, they often rise together when a hot-water leak is the cause.

> **Tell-tale, Warm spots on the floor.** Walk the house barefoot in the morning, before the sun has warmed the slab. A noticeably warm patch can tell us which room to start in, though not where the pipe has actually failed.

*Related: [Slab leaks](/services/slab-leaks), [High water bills](/services/high-water-bills)*

### 04, Why is my toilet running all the time?

*Category: Fixtures*

Almost always a worn-out flapper or a faulty fill valve inside the tank. The flapper lets water slowly leak from the tank into the bowl, so the fill valve keeps turning on to top it off, sometimes loudly, sometimes silently.

Lift the tank lid and look. If the water level is dropping when nothing is being used, or you hear a constant hiss, that’s almost certainly it. Both parts are inexpensive and replaceable, but a chronically running toilet is a quiet contributor to a high water bill.

> **Quick check, The dye-tablet test.** Put a few drops of food coloring in the tank (not the bowl). Don’t flush. Wait 15 minutes. If color shows up in the bowl, the flapper is leaking.

*Related: [High water bills](/services/high-water-bills)*

### 05, Why is my pool pump not priming?

*Category: Pool & spa*

If the pump itself is working, the usual cause is a broken or cracked suction line underground. When the pump turns on, it creates negative pressure on that line and sucks air in through the break instead of water. You’ll see air bubbles in the basket, hear cavitation (a loud rattling), or watch the pump lose prime over and over.

The same break can also lose pool water when the system is off, the line drains through the crack into the surrounding soil. Pressure testing isolates which line, and our detection equipment locates the break so deck access is planned around the repair.

*Related: [Pool & water features](/services/pool-water-features)*

### 06, Why is water running out of the drain at the front of my property?

*Category: Yard & service line*

Several possibilities: a main water line leak between the meter and the house, a slab leak under the foundation working its way forward, an irrigation leak (pressure side before the valves, a stuck-open valve, or a break on the low-pressure side), or, if you have a swimming pool, water escaping the pool that travels through soil or deck drains and exits at the street drain.

Turn things off one by one, house water, then irrigation, then pool, and note when the flow stops. That alone narrows it down for the technician before they arrive.

> **Process of elimination, Isolate, then watch.** House valve off → still flowing? Not the house line. Irrigation off at the controller → still flowing? Not irrigation. Whatever shuts the flow off is the system at fault.

*Related: [Irrigation](/services/irrigation), [Pool & water features](/services/pool-water-features), [Slab leaks](/services/slab-leaks)*

### 07, Why is my water pressure low in my house?

*Category: Pressure*

Could be a leak in the pressurized plumbing system, water is literally escaping before it reaches your fixtures.

Other common causes: old galvanized pipes clogged with rust and minerals, a failing pressure-reducing valve (PRV) not allowing enough flow, or a partially closed shut-off valve somewhere in the line. A quick test: if pressure is low everywhere inside but normal at an outside hose bib, the problem is most likely inside the house.

> **Compare, Inside vs. outside the house.** Run an outside hose bib at full open and a kitchen faucet at full open. If the bib is strong and the kitchen is weak, the loss is happening inside the house plumbing.

*Related: [Hidden leak detection](/services/hidden-leak-detection), [Plumbing diagnostics](/services/diagnostic)*

### 08, Why is my house humid?

*Category: Building envelope*

Excess moisture can come from poor ventilation (long showers, cooking, many people breathing), groundwater or rainwater getting past moisture barriers, hidden plumbing leaks or drain-line leaks, or a hot-water slab leak, hot water under the slab turns to steam and rises into the house.

If you’ve ruled out lifestyle factors and you still see condensation on the inside of windows, or you smell that persistent musty note, a concealed leak is very likely. The slab-leak version of this often arrives with warm flooring that gives us a starting area; the drain-line version often arrives with a smell.

> **Rule out, The lifestyle factors first.** Run bath fans during and 20 minutes after showering. Vent the dryer to the outside. Cover pots when boiling. If the humidity hasn’t dropped after a week, the moisture isn’t coming from how you live in the house.

*Related: [Slab leaks](/services/slab-leaks), [Hidden leak detection](/services/hidden-leak-detection)*

### 09, Why is my plastered pool losing water?

*Category: Pool & spa*

Pools lose water for many reasons. Normal evaporation is about ¼ inch in 24 hours, more in hot, windy, or low-humidity weather. Beyond that, leaks can occur in the plumbing lines, the tile line, the lights, the skimmer throat, cracks in the plaster or shell, or around any fitting.

A bucket test separates normal evaporation loss from a likely leak. If the pool is losing more than evaporation accounts for, a pool leak test finds whether the source is plumbing, fittings, shell, lights, skimmer throat, or another pool component.

> **Do this at home, The bucket test.** Float a bucket of water on the top step of the pool, fill it to match the pool’s level, and mark both. Wait 24 hours. If the pool dropped more than the bucket, the difference is the leak.

*Related: [Pool & water features](/services/pool-water-features)*

### 10, Why is my well not working?

*Category: Well & supply*

If the pump and well have water but you still lose pressure or the pump runs constantly, the most common hidden issue is a broken main line between the pump and the house or storage tank. The pump can’t keep up with the constant loss.

Foothill and Sierra customers see this most often, long supply runs across uneven terrain, freeze-thaw cycles, and shifting ground all conspire against the line. The line itself is usually fine; one specific section has given way, and detection equipment finds it without digging the whole length.

*Related: [Hidden leak detection](/services/hidden-leak-detection), [Plumbing diagnostics](/services/diagnostic)*

### 11, Why is water dripping from my ceiling, or why is my carpet or floor wet?

*Category: Interior*

In a two-story home, anything on the second floor can leak downward: supply lines, drain lines, shower pans and valves, tub enclosures, toilet wax rings, AC condensate lines in the attic.

Start by checking the room directly above the wet spot. But know this: water travels surprisingly far along joists and subfloor before it shows up below, so the wet patch on the ceiling is rarely directly under the source. Tracing the path back is what detection equipment is for.

> **Don’t, Open the ceiling yet.** The first instinct is to cut a hole at the wet spot. Usually the leak is several feet away, along a joist. Locate the source first so any access opening is planned around the repair, not the search.

*Related: [Mystery leaks](/services/mystery-leaks), [Hidden leak detection](/services/hidden-leak-detection)*


## Claim safety notes

- Distinguish the Sacramento-area franchise and Roseville office address from the broader American Leak Detection corporate brand.
- Do not imply 24-hour service, response-time guarantees, reviews, ratings, awards, prices, or repair guarantees unless confirmed in source content.
- Describe the core offer as detection, diagnosis, location, documentation, and repair, while noting that third-party vendors may be needed for water damage, stucco, window, irrigation, pool plaster, or cosmetic restoration work.

Canonical URL: https://www.americanleakdetect.com/faqs