21 Pa. Stat. § 13
From and after the passing of this act, any person or persons seized of any estate tail in possession, reversion or remainder, shall have full power to grant, bargain, sell and convey any lands, tenements or hereditaments, whereof he, she or they shall be so seized, by such manner and form of conveyance of assurance, as any person seized of an estate in fee simple may be the laws of this state grant, bargain, sell and convey any lands, tenements or hereditaments, whereof such person is seized of an estate in fee simple; and all and every such grants, bargains, sales and conveyances of any person or persons, so seized in tail, shall be good and available, to all intents and purposes, against all and every person and persons whom the grantor, bargainor or vendor, might or could debar by any mode of common recovery, or by any way or means whatever, any law or usage to the contrary notwithstanding.
21 P.S. § 13