Plumbing Solution Specialist – All County Plumbers

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What Causes Slab Leaks

Slab leaks are caused by damage or failure in water pipes located beneath a concrete foundation. Over time, several conditions can weaken pipes and lead to leaks under the slab.
  • Pipe corrosion caused by water chemistry, soil conditions, or electrical grounding issues
  • Abrasive contact between piping and concrete or shifting soil
  • High water pressure placing constant stress on underground pipes and joints
  • Poor installation or defective materials including bad joints or unsupported piping
  • Foundation movement or soil shifting stressing pipes beneath the slab
  • Thermal expansion and contraction in hot water lines
  • Aging plumbing systems with material fatigue over time

Can slab leaks occur in both hot and cold water lines?

Yes. Slab leaks can occur in both hot and cold water lines. Hot water lines often fail sooner due to heat related expansion and contraction, while cold water lines are more commonly affected by corrosion and pressure related stress.

Are slab leaks always caused by broken pipes?

No. Slab leaks are not always caused by fully broken pipes. Many slab leaks are the result of pinhole leaks, weakened joints, deteriorated fittings, or gradual pipe corrosion.