CSLB C-36 Plumbing ContractorService, Repair, and MaintenanceHard
A commercial property manager reports that their water bill has significantly increased over the past few months, but there are no visible leaks anywhere in the building, and no changes in water usage patterns. The property has a concrete slab foundation. What is the most likely cause of the increased water consumption?
- AA faulty water meter providing inaccurate readings.
- BIncreased water pressure causing higher flow rates through fixtures.
- CAn invisible leak in the main water supply line under the slab.
- DA continuous overflow in a toilet tank that is not visibly apparent.
Show answer & explanationAnswer & explanation
Correct answer: C. An invisible leak in the main water supply line under the slab.
A significant, unexplained increase in a water bill with no visible leaks, especially in a slab foundation property, is a strong indicator of a hidden slab leak. These leaks can go unnoticed for long periods, causing substantial water loss.
Why the other options are wrong
- A. While possible, faulty water meters are less common than leaks and would usually be investigated by the utility company first if suspected.
- B. Increased water pressure might slightly increase consumption but would rarely account for a 'significantly increased' bill without other noticeable issues like splashing or fixture damage.
- D. A continuous toilet overflow, even if not visibly apparent, would typically be audible or cause a consistent running sound, which would be a visible 'change' in use.
Hidden Slab Leak Detection
Identifying water leaks in supply or drain lines embedded within or beneath a concrete slab foundation, often indicated by unexplained water loss or localized hot spots.
- Primary symptom is a sudden, unexplained increase in water bill.
- Other signs include warm spots on the floor, sound of running water, or foundation cracks.
- Requires specialized acoustic or thermal imaging equipment for accurate location.
Memory trick: Meter spinning, no visual sinning, slab leak's winning.