{
  "category": "Backflow Preventers",
  "vertical": "plumbing-and-pvf",
  "source": "https://getclaro.ai/resources/attribute-library/plumbing-and-pvf/backflow-preventers/",
  "status": "editorial-draft",
  "note": "Editorial reference template. Example values show format only and do not describe a real SKU. Not an official ETIM or ECLASS class.",
  "groups": [
    {
      "key": "identity",
      "name": "Identity",
      "check": "Preserve leading zeros and punctuation, validate against the manufacturer record, and check the GTIN check digit and packaging level before linking."
    },
    {
      "key": "technical",
      "name": "Technical specifications",
      "check": "Store the number and unit separately. Convert only when the source unit and test conditions are known."
    },
    {
      "key": "selection",
      "name": "Selection attributes",
      "check": "Map supplier wording to a governed vocabulary only after checking the source text and which variant it applies to."
    },
    {
      "key": "fit",
      "name": "Fit & compatibility",
      "check": "Keep model and series qualifiers. A similar-looking part is not a verified fit until a source says so."
    },
    {
      "key": "evidence",
      "name": "Evidence & compliance",
      "check": "Link the manufacturer document or label with its edition or date. Never copy a certification from a neighboring SKU."
    }
  ],
  "fields": [
    {
      "key": "assembly_type",
      "label": "Assembly Type",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Reduced Pressure Principle Assembly (RP)"
    },
    {
      "key": "nominal_size",
      "label": "Nominal Size",
      "group": "technical",
      "priority": "core",
      "value_type": "controlled",
      "unit": "in",
      "example_format": "3/4 in (DN 20)"
    },
    {
      "key": "end_connection",
      "label": "End Connection",
      "group": "fit",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "FNPT (ASME B1.20.1)"
    },
    {
      "key": "body_material",
      "label": "Body Material",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Lead-free cast bronze"
    },
    {
      "key": "maximum_working_pressure",
      "label": "Maximum Working Pressure",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "psi",
      "example_format": "175"
    },
    {
      "key": "working_temperature_range",
      "label": "Working Temperature Range",
      "group": "technical",
      "priority": "core",
      "value_type": "text",
      "unit": "°F",
      "example_format": "33 to 140 °F"
    },
    {
      "key": "manufacturer_part_number",
      "label": "Manufacturer Part Number",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "BFP-RP-075-LF"
    },
    {
      "key": "hazard_level",
      "label": "Hazard Level",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "High hazard (health hazard)"
    },
    {
      "key": "shutoff_valve_type",
      "label": "Shutoff Valve Type",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Quarter-turn ball valves"
    },
    {
      "key": "service",
      "label": "Service",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Potable water"
    },
    {
      "key": "overall_lay_length",
      "label": "Overall Lay Length",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "in",
      "example_format": "10.25"
    },
    {
      "key": "test_cocks_qty_x_size",
      "label": "Test Cocks (Qty x Size)",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "text",
      "unit": null,
      "example_format": "4 x 1/4 in"
    },
    {
      "key": "series_option_code",
      "label": "Series & Option Code",
      "group": "identity",
      "priority": "differentiating",
      "value_type": "identifier",
      "unit": null,
      "example_format": "RP-500 / LF-QT"
    },
    {
      "key": "approved_installation_orientation",
      "label": "Approved Installation Orientation",
      "group": "fit",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Horizontal only"
    },
    {
      "key": "asse_standard_listing",
      "label": "ASSE Standard Listing",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "ASSE 1013"
    },
    {
      "key": "third_party_approvals",
      "label": "Third-Party Approvals",
      "group": "evidence",
      "priority": "channel",
      "value_type": "text",
      "unit": null,
      "example_format": "NSF/ANSI/CAN 61 and 372; IAPMO; CSA B64.4"
    },
    {
      "key": "ul_fm_fire_service_approval",
      "label": "UL/FM Fire Service Approval",
      "group": "evidence",
      "priority": "channel",
      "value_type": "text",
      "unit": null,
      "example_format": "Not listed (potable service model)"
    },
    {
      "key": "country_of_origin",
      "label": "Country of Origin",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "United States"
    }
  ],
  "evidence_columns": [
    "raw_value",
    "normalized_value",
    "source_uri",
    "source_page_or_row",
    "confidence",
    "review_state",
    "last_verified"
  ],
  "normalization_examples": [
    {
      "attribute": "Assembly Type",
      "variants": [
        "RPZ",
        "RP",
        "RPZA",
        "RPBA",
        "Reduced Pressure Zone",
        "Red. Press. Principle"
      ],
      "normalized": "Reduced Pressure Principle Assembly (RP)"
    },
    {
      "attribute": "End Connection",
      "variants": [
        "FNPT",
        "FIP",
        "Female NPT",
        "F NPT",
        "FPT",
        "NPT-F"
      ],
      "normalized": "FNPT"
    },
    {
      "attribute": "Nominal Size",
      "variants": [
        "3/4\"",
        "3/4 in",
        "0.75",
        "DN20",
        "3/4 IN.",
        "3/4-inch"
      ],
      "normalized": "3/4 in (DN 20)"
    }
  ]
}