Water Seal Control

{
  "id": "MLC-T-ENV-030116",
  "term": "Water Seal Control",
  "field": "Environment",
  "definition": "1. Seal pot, p-leg trap, or other type of trap filled with water that has a design capability to create a water barrier between the sewer and the atmosphere.\n\n2. Seal pot, p-leg trap, or other type of trap filled with water (e.g., flooded sewers that maintain water levels adequate to prevent air flow through the system) that creates a water barrier between the sewer line and the atmosphere. The water level of the seal must be maintained in the vertical leg of a drain in order to be considered a water seal. [40 CFR 63.1251 (CFR 2013)][64 FR 33589, June 23, 1999, as amended at Nov. 21, 2001; 67 FR 59343, Sept. 20, 2002; 71 FR 20460, Apr. 20, 2006] [40 CFR 63.1361 (CFR 2013)]",
  "references": [
    "40 CFR 60.691 (CFR 2013)",
    "40 CFR 63.101 (CFR 2024)"
  ],
  "url": "https://mlchart.com/terminology/environment/water-seal-control/"
}