Reference for Bava Batra 116:9
רב ירמיה בר אבא אמר המרזב אין לו חזקה שאם רוצה לבנות תחתיו בונה ויש למקומו חזקה שאם בא לעוקרו אינו עוקרו
BUT THERE IS FOR ITS PLACE.<span class="x" onmousemove="('comment',' This is explained in the Gemara, infra. ');"><sup>8</sup></span> THERE IS <i>HAZAKAH</i> FOR A ROOFGUTTER.<span class="x" onmousemove="('comment',' The whole of this Mishnah is explained in the Gemara. ');"><sup>9</sup></span> THERE IS NO <i>HAZAKAH</i> FOR AN EGYPTIAN LADDER BUT THERE IS FOR A TYRIAN. THERE IS NO <i>HAZAKAH</i> FOR AN EGYPTIAN WINDOW BUT THERE IS FOR A TYRIAN. WHAT IS AN EGYPTIAN WINDOW? ONE THROUGH WHICH A MAN CANNOT PUT HIS HEAD. R. JUDAH SAYS THAT IF IT HAS A FRAME, EVEN THOUGH A MAN CANNOT PUT HIS HEAD THROUGH IT, THERE IS <i>HAZAKAH</i> FOR IT. <b><i>GEMARA</i></b>. What [is meant by Saying that] THERE IS NO <i>HAZAKAH</i> FOR A GUTTER-PIPE BUT THERE IS FOR ITS PLACE? — Rab Judah said in the name of Samuel: It means this. There is no <i>hazakah</i> for the gutter-pipe at one particular end of the gutter,<span class="x" onmousemove="('comment',' The fact that the owner of the courtyard has allowed the owner of the roof to keep his pipe overhanging the yard for three years without protest does not confer on him a permanent right to do so, because as it is not a fixture the owner of the courtyard is not particular about it, and therefore the fact of his not protesting is nothing to go by. ');"><sup>10</sup></span> but there is a <i>hazakah</i> for it to be placed either at one end or the other.<span class="x" onmousemove="('comment',' Because a pipe at one end or the other is necessary for the roof and therefore it is to a certain extent a fixture. ');"><sup>11</sup></span> R. Hanina said: There is no <i>hazakah</i> for the gutterpipe<span class="x" onmousemove="('comment',' I.e., the owner of the roof has no title to it. ');"><sup>12</sup></span> [to the extent] that if he [the owner of the courtyard] finds it too long he can have it shortened, but there is <i>hazakah</i> for its place [to the extent] that if he wants to remove it altogether he is not at liberty to do so. R. Jeremiah b. Abba said: There is no <i>hazakah</i> for a gutter [in so far] that if he [the owner of the courtyard] desires to build under it he may do so,<span class="x" onmousemove="('comment',' Since ownership of the gutter confers no title to the space under it. ');"><sup>13</sup></span> but there is <i>hazakah</i> for its place [to the extent] that if he wants to remove it altogether, he is not at liberty to do so.