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A dripping faucet. A toilet that runs for a few seconds after flushing. A barely visible wet spot under the bathroom sink. Homeowners dismiss these as minor inconveniences. Our plumber Noah recently responded to a Duncan homeowner who had noticed a small damp spot on the bedroom carpet near the bathroom wall. They’d been meaning to “look into it” for about two weeks. By the time Noah opened the wall, the supply line fitting behind the shower valve had been seeping for weeks — the drywall was saturated, the subfloor was soft, and mold was already establishing in the wall cavity. A $250 fitting repair turned into a $250 plumbing fix plus a $3,000+ remediation project.
Our plumbers know better than to call any leak “minor” — because we see the consequences when they’re ignored.
The Real Cost of a Small Leak
Water Waste
- A faucet dripping once per second wastes 3,000+ gallons per year
- A running toilet can waste 200 gallons per day — that’s 6,000 gallons per month
- A pinhole supply line leak at 1 drip per second adds $20-$30/month to your water bill
These numbers are invisible until you compare water bills year-over-year or notice the total on an unusually high bill.
Hidden Moisture Damage
The water you see dripping is only part of the problem. The moisture you don’t see is worse:
Under-sink leaks saturate the cabinet floor, which warps and rots. Moisture wicks into the wall behind the cabinet, creating a hidden environment for mold growth. By the time you see staining on the outside of the cabinet, the interior damage is extensive.
Slab leaks (leaks in pipes under a concrete foundation) saturate the soil and can undermine the foundation. Signs: warm spots on the floor, the sound of running water with no fixtures on, unexplained moisture or mildew smell, a spinning water meter when all water is off.
Behind-wall leaks from supply lines or drain connections are completely invisible until they’ve caused enough damage to show through the drywall — stains, bubbling paint, or a soft spot in the wall. By then, mold is likely established in the wall cavity.
Mold Growth
Mold needs three things: moisture, warmth, and organic material (drywall, wood, insulation). A small plumbing leak provides all three. Mold can begin growing within 24-48 hours of initial moisture exposure and can spread through wall cavities, affecting areas well beyond the original leak.
Professional mold remediation costs $1,500-$5,000+ depending on the extent. The plumbing repair that would have prevented it? Usually $100-$300.
Structural Damage
Chronic moisture weakens wood framing, subfloor, and joists. A supply line leak in a second-floor bathroom can damage the ceiling below, the subfloor, and the framing between — turning a $200 plumbing repair into a $5,000+ structural and cosmetic restoration.
How to Catch Small Leaks Early
Monthly water meter check: Read your meter, wait 2 hours with no water use, read again. If the number changed, you have a leak somewhere.
Under-sink inspection: Open every cabinet under a sink and look for moisture, drips, stains, or warped wood. Feel the supply lines and connections for dampness.
Toilet test: Add food coloring to the tank. Wait 15 minutes without flushing. If color appears in the bowl, the flapper is leaking.
Water heater check: Look around the base of the water heater for pooling or rust stains. Check the T&P valve discharge pipe for dripping.
Water bill comparison: Compare your bill to the same month last year. An unexplained increase of $20+ warrants investigation.
What Our Plumbers Recommend
Fix every leak when you find it — not “when it gets worse” or “when we have time.” The repair cost today is always less than the damage cost tomorrow:
| Leak | Repair Cost | Potential Damage Cost | |——|————|———————| | Dripping faucet | $150-$300 | $2,000+ (counter/cabinet damage) | | Running toilet | $50-$150 | $1,000+/year (wasted water) | | Supply line drip | $100-$250 | $5,000+ (mold, structural) | | Slab leak | $500-$2,000 | $10,000+ (foundation, flooring) |
Every plumbing repair we do starts with a thorough inspection — we don’t just fix the drip, we check the cause and look for other developing issues nearby.
YOUTUBE EMBED: Got High Water Pressure? This One Valve Fixes It FAST — @YallCallWally
Call Waldrop Plumbing Air Electric at (864) 536-0887. We fix the small stuff before it becomes the big stuff.
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