Most faucet leaks don’t announce themselves. A slow drip at 2 a.m. is easy to hear once, then easy to tune out for months, and a leak at the connection under the sink can run for weeks before anyone notices a damp cabinet. In Mira Mesa homes with original supply lines from the neighborhood’s early-1970s construction, aging connections make a slow leak more likely, not less, which makes knowing how to actually check for one worth five minutes of your time.

Courtesy Plumbing has been licensed and serving San Diego County (CSLB #910268) since 2007. Once you’ve found a leak using the methods below, our faucet repair team can fix it, and if it turns out the leak isn’t actually at the faucet, our general plumbing leak repair team in Mira Mesa can trace it further.

Three Ways to Actually Check

1. The Sound and Sight Method

This catches the leaks you’d expect to notice, but often don’t, until you’re actually listening for them. Stand near each faucet in a quiet moment (last thing at night works well) and listen for a drip. Then look closely at the base of the faucet, the handle, and the underside where it connects to the sink. Even a small amount of visible moisture confirms a leak worth addressing, even if it seems too minor to matter.

2. The Tissue Test for Leaks You Can’t See or Hear

Some leaks are slow enough to evaporate before they’re visible and quiet enough to never hear. For these, dry the area around the base of the faucet and the connections underneath the sink completely, then press a dry tissue or paper towel against those spots and leave it undisturbed for an hour or two without using the faucet. Any dampness on the tissue when you check it back is your answer.

3. The Water Meter Check, for Leaks You Can’t Locate at All

This is the method to use when you suspect a leak somewhere in the house but the first two methods haven’t found it. Make sure nothing in the house is using water, no shower, no dishwasher, no washing machine, no outdoor irrigation, then find your water meter and record the reading. Wait one to two hours without using any water, then check the meter again. If the number has moved, water is escaping somewhere in your system, even if it isn’t at any faucet you’ve checked.

Why This Matters More in Older Mira Mesa Homes

Original supply line connections and shutoff valves from the neighborhood’s early-1970s construction are decades past their expected service life in many homes. A worn valve or an aging compression fitting is more likely to develop a slow weep than a newer connection, and slow leaks in older homes have had more time to cause secondary damage, warped cabinet floors, mineral staining, even mold, by the time they’re finally caught. If your water meter check confirms a leak you can’t locate, that’s a sign it’s worth having a professional trace it rather than continuing to guess.

What a Leak Actually Costs You

A faucet dripping once per second wastes over 3,000 gallons a year, roughly equivalent to 180 showers, and that’s a single slow faucet, not a burst pipe. Multiply that across a house with more than one leaking fixture and the number on your water bill starts making a lot more sense. The EPA’s Fix a Leak Week resources have a useful independent breakdown of how common household leaks add up.

If the water meter test points to a leak you can’t find at any faucet, it’s often in a supply line or fixture connection elsewhere in the house. Our water line leak repair and moisture and leak detection services can locate it without tearing into walls or cabinets unnecessarily.

Frequently Asked Questions

Why do faucets start leaking in the first place?

The most common cause is a worn internal O-ring or washer, which degrades with normal use over years. In older homes, corrosion at the valve or supply line connection is also a common contributor.

Can I fix a leaking faucet myself, or should I call a plumber?

A worn washer or O-ring is often a straightforward DIY fix if you’re comfortable shutting off the water supply and working with basic tools. If the leak is at a connection rather than inside the faucet itself, or if you’re not confident diagnosing which part has failed, it’s worth having a professional take a look rather than risk a bigger leak from a failed repair attempt.

My water meter shows a leak but I can’t find it anywhere. What now?

At that point, the leak is likely in a supply line, a fixture connection you haven’t checked, or somewhere underground between the meter and the house. This is exactly the situation where a professional leak detection service pays for itself, rather than continuing to guess and potentially cause secondary damage.

Get It Found and Fixed

Call (858) 567-0544 or request an appointment online if you’ve found a leak, or if your water meter says you have one and you can’t locate it. Courtesy Plumbing Inc. is licensed under CSLB #910268 and has served San Diego County homeowners since 2007.