"union tee" meaning in English

{
  "forms": [
    {
      "form": "union tees",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "union tee (plural union tees)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A tee pipe fitting with female connections on all three ends."
      ],
      "id": "en-union_tee-en-noun-aSghFx78",
      "links": [
        [
          "tee",
          "tee"
        ],
        [
          "pipe",
          "pipe"
        ],
        [
          "fitting",
          "fitting"
        ],
        [
          "female",
          "female"
        ],
        [
          "connection",
          "connection"
        ]
      ],
      "related": [
        {
          "word": "branch tee"
        },
        {
          "word": "run tee"
        }
      ]
    }
  ],
  "word": "union tee"
}

{
  "forms": [
    {
      "form": "union tees",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "union tee (plural union tees)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "branch tee"
    },
    {
      "word": "run tee"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms derived from the shape of letters",
        "English terms with non-redundant non-automated sortkeys",
        "Pages with raw sortkeys"
      ],
      "glosses": [
        "A tee pipe fitting with female connections on all three ends."
      ],
      "links": [
        [
          "tee",
          "tee"
        ],
        [
          "pipe",
          "pipe"
        ],
        [
          "fitting",
          "fitting"
        ],
        [
          "female",
          "female"
        ],
        [
          "connection",
          "connection"
        ]
      ]
    }
  ],
  "word": "union tee"
}