{
  "page": "/us/lifespan/expansion-tank",
  "built_from": "data/lifespan/facts/expansion-tank.json",
  "rows": [
    {
      "type": "Water-heater thermal expansion tank",
      "measure": "EPB guidance: around six years; varies with usage and water quality",
      "value": 6,
      "unit": "years; around",
      "source": "EPB, Water Heater Expansion Tank: What It Is & When You Need One",
      "url": "https://epb.com/get-connected/energy-tips/what-is-a-water-heater-expansion-tank/",
      "data_years": "2025 guidance; study years not published",
      "read": "2026-11-04",
      "area": "Home water-heater expansion tanks",
      "n": "not published by the source",
      "se_points": null,
      "fact_id": "exp-epb-six-years"
    },
    {
      "type": "Water-heater expansion tank inspection",
      "measure": "EPB suggested technician inspection interval",
      "value": 1,
      "unit": "year; suggested inspection interval",
      "source": "EPB, Water Heater Expansion Tank: What It Is & When You Need One",
      "url": "https://epb.com/get-connected/energy-tips/what-is-a-water-heater-expansion-tank/",
      "data_years": "2025 guidance; study years not published",
      "read": "2026-11-04",
      "area": "Home water-heater expansion tanks",
      "n": "not published by the source",
      "se_points": null,
      "fact_id": "exp-epb-inspection"
    }
  ]
}