Burst Pipe Water Loss Calculator
See how much water a broken or cracked pipe releases before it is shut off.
Estimates use typical industry ranges and published methods. They are not a quote. An on-site moisture inspection sets the actual scope.
First: stop the water
Every adult in the house should know where the main shutoff is. In most Mesquite homes it's a gate or ball valve near an outside faucet at the front of the house, or in the meter box at the street (a meter key from any hardware store opens it). Shut it, then open a low faucet to drain pressure off the lines. If water is near outlets or the electrical panel, cut power to that area at the breaker.
Common pipe failures in Mesquite homes
- Freeze bursts — attic and exterior-wall pipes during hard freezes, with damage discovered during the thaw. See frozen pipe prevention.
- Slab leaks — copper lines under the foundation pinhole with age; the first signs are warm spots on the floor, unexplained water bills, or flooring darkening from below. See slab leak water damage.
- Supply line failures — the braided or plastic lines feeding toilets, faucets, washers and fridges are one of the most common sources of major residential water damage. See appliance leaks.
- Fitting and PEX connection failures — crimp rings and push-fit connectors can let go, often inside walls.
- Water heater tank failure — 40–50 gallons released at once, often in an attic or interior closet where it soaks everything below. See water heater leaks.
How much water a broken pipe releases
Flow depends on the size of the opening and your water pressure, up to what your service line can deliver. A pinhole leak might lose a few gallons an hour; a fully separated fitting on a pressurized line runs close to your whole-house flow rate. The calculator above uses the standard orifice-flow formula, capped at typical residential service capacity, to show the volume in your situation.
| Opening at 60 psi | Approx. flow | In 1 hour |
|---|---|---|
| 1/16" pinhole | ~0.6 gal/min | ~35 gallons |
| 1/8" crack | ~2.3 gal/min | ~135 gallons |
| 1/4" split | ~9 gal/min | ~540 gallons |
| Full break | ~12 gal/min (service-limited) | ~720 gallons |
Then: dry it properly
Clean supply water is the most salvageable category of water damage — if drying starts quickly. Extraction, metered structural drying, and antimicrobial treatment where water sat can save flooring, cabinets and drywall that would otherwise be demolition. Insurance almost always treats a burst pipe as sudden and accidental, which means covered.
Leaks inside walls are the tricky ones: the cavity behind drywall holds water against studs and the bottom plate. Crews often drill small holes behind baseboards or remove baseboards to push dry air into the cavity rather than cutting out entire walls.