If water is registering on your Castle Rock meter with nothing running, or part of a floor is warm or damp, a supply line under the concrete may be leaking. Plumbing in and under the home is the owner's responsibility, and a local plumber can confirm it before anything is opened. Call the number on this page to be connected with a local plumber in Castle Rock.

Castle Rock is a large, growing town along I-25, so many homes are fairly new, with older houses near downtown below the butte. Castle Rock Water draws mostly on deep Denver Basin wells plus renewable supplies, disinfects with chloramine, and reports moderately hard water averaging about 100 ppm. Its inventory found its service lines are non-lead. Some addresses with a Castle Rock mailing address, such as The Village at Castle Pines, get water from other districts. In any case, a leak in pipe inside or beneath the house is a job for a plumber rather than the utility, and newer homes are as likely to have plastic under the slab as copper. Basements are common here, and a basement floor is a slab with lines beneath it like any other.
Steps to take now
- Run a meter test. Shut off every fixture and the irrigation, record the meter, wait an hour, and read it again.
- Check the easy suspects. Listen at each toilet and look at outdoor faucets and the water softener drain line if you have one.
- Isolate the water heater. Close its cold inlet. If the meter stops, the leak is probably on the hot side.
- Protect the house. If water is surfacing through the floor, shut the main valve and lift rugs and furniture away.
- Keep notes and photos. They help the plumber and any insurance claim.
- Have it located before cutting. Pressure testing and acoustic listening should pinpoint the spot first.
What the symptoms usually mean
| Symptom | Likely cause |
|---|---|
| Heat in one strip of the floor | Hot supply line leaking beneath it |
| Meter creeps, nothing feels warm | Cold-side leak under the slab or on the yard line |
| Musty odor near a basement wall | Water collecting under or behind finishes |
| Weak flow at one bath only | Leak on the branch line to that room |
| Hot water runs out sooner | Heated water escaping before it reaches the tap |
What affects cost
- How long it takes to isolate and pinpoint the leak
- Repairing through the slab versus rerouting overhead
- The floor finish over the leak and how much needs to be replaced
- Drying and repair of anything that has already gotten wet
- Town of Castle Rock building permit requirements for the scope of work
A plumber can usually tell you after the locate whether a spot repair or a reroute is the better value for your floor plan.
Slab Leak Repair questions in Castle Rock
Could the local water be wearing out the pipe under my floor?
What is the fastest meter test for a hidden leak?
Can PEX or other plastic pipe under concrete still leak?
Can a slab leak wait a few days?
More plumbing services in Castle Rock
Slab Leak Repair nearby
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