Signs You May Have a Hidden Plumbing Leak in Chandler

Chandler’s water hardness — among the highest in the Phoenix Valley — is hard on plumbing systems. Copper pipes in homes built in the 1980s and 1990s develop pinhole leaks from the inside out due to electrochemical corrosion accelerated by high mineral content. Newer PEX homes are more resistant, but fittings and connections can fail. In both cases, hidden leaks often run for months before any visible sign appears.

Water Bills That Don’t Add Up

The City of Chandler provides monthly water billing with usage data available online. If your usage has increased without explanation — same household, same routine — a hidden leak is the most likely cause. Compare your current usage to the same month in prior years. A 15–20 percent unexplained increase warrants a professional check before you pay another elevated bill.

Musty Smell Without a Visible Source

Chandler’s dry climate means mold growth from a hidden leak is slower to develop than in humid regions, but it does happen — particularly in enclosed spaces like under-sink cabinets, inside walls, and in attic spaces. A musty or earthy odor localized to one area of the house without an obvious source is worth investigating. By the time you can smell mold in a dry climate, there’s usually enough moisture to confirm a leak with detection equipment.

Discoloration Around Fixtures and Joints

Look at supply connections under sinks, at toilet bases, and at washing machine hoses for signs of mineral staining, rust streaking, or slight dampness. In Chandler’s hard water environment, a slow drip at a connection will leave a distinctive white or tan mineral deposit before you’d notice the moisture itself.

Foundation Cracks or Shifting in Slab Homes

Slab leaks in Chandler homes — particularly those built in the 1990s with copper lines running through the slab — can cause localized soil erosion that leads to foundation movement. If you’re seeing new cracks in tile grout, sticking doors, or hairline cracks in drywall, a slab leak should be on the diagnostic list. Chandler Plumbing Experts performs leak detection for Chandler homeowners and has experience with slab-era homes in central and north Chandler.

The Meter Test

Shut off every water-using device including the irrigation controller, ice maker, and softener. Note the meter reading, wait 30 minutes, check again. If the meter has moved, water is leaving the system. Ocotillo Plumbing & Drain and Chandler Water Works both offer diagnostic visits for Chandler homeowners who’ve confirmed meter movement and need help locating the source.