Quick Action Guide: What To Do If You Suspect a Leak
Use this 60-second checklist to limit damage before a professional arrives.
- Kill the water:
- Fixture leak → turn the stop valve under the sink/toilet clockwise.
- Not sure where it’s coming from? → use the main shutoff (by the meter, garage wall, or curb box).
- Kill nearby power: If water is near outlets/appliances, flip the breaker before touching anything wet.
- Contain it: Towels, buckets, a pan under drips. Move rugs/furniture. Open sink cabinets.
- Protect finishes: Place foil/plastic under furniture legs; pull area rugs off hardwoods.
- Document: Take quick photos/videos of where water shows and any damage (helps insurance and your plumber).
- Meter test (fast confirmation): Turn off all fixtures. Check the meter’s small dial/triangle—if it spins, you have a supply-side leak.
Temporary Stop-Gaps (Until a Pro Arrives)
| Issue | Quick Fix | Notes |
|---|---|---|
| Pinhole in copper/galvanized | Pipe repair clamp | Clean/dry pipe first |
| Weeping hairline crack | Epoxy putty | Press firmly; allow cure time |
| Drip at threaded joint | PTFE tape + pipe dope | Re-wrap threads, snug—not over-tight |
| Leaky supply tube | Compression cap | Cap the valve outlet temporarily |
Skip “spray-on” miracle fixes on pressurized lines—they often fail.
When to Call a Pro (No DIY)
- Leak is inside a wall/ceiling or under the slab.
- Warm floor spots, hissing behind walls, or the meter spins with the main “off.”
- Ceiling sagging, bulging paint, or breakers tripping near the leak.
Need fast help? Our same-day leak detection & repair service pinpoints hidden leaks and fixes them safely.
After the Leak: Prevent Mold (First 24–48 Hours)
- Get air moving: fans + open interior doors; set HVAC fan to “On.”
- Run a dehumidifier and aim for <50% RH.
- Pull baseboards where it’s wet to vent the wall gap.
- Remove saturated pads/insulation that won’t dry within 24–48 hours.
- Disinfect hard surfaces after drying.
How to Spot Trouble Early (So It Doesn’t Happen Again)
| Area | What to Check | Frequency |
|---|---|---|
| Under sinks & toilets | Moisture, green/white crust on fittings, swollen cabinet floors | Monthly |
| Water heater & laundry | Puddles, rust trails, bulging hoses | Monthly (replace washer hoses every 5 years) |
| Bills & meter | Unexplained usage spikes; meter movement when fixtures are off | Monthly |
| Smart sensors | Install leak detectors under sinks, at heater, behind washer | Set & test quarterly |
| Shutoff valves | Verify they turn freely and fully stop flow | Every 6 months |
Printable Mini-Guide (Copy/Paste for Fridge)
- 1) Shut water (fixture → stop valve; unknown → main).
- 2) Kill power near water.
- 3) Contain & protect: towels, buckets, lift rugs, foil under legs.
- 4) Photo/video for records.
- 5) Meter check to confirm hidden leak.
- 6) Call a pro if leak is hidden, structural, or recurring.
Need guidance now? Start here: Professional Leak Detection.
