42 Pa. C.S. § 8324 : Consolidated Statutes — JUDICIARY AND JUDICIAL PROCEDURE — CIVIL ACTIONS AND PROCEEDINGS — PARTICULAR RIGHTS AND IMMUNITIES — CONTRIBUTION AMONG TORT-FEASORS — Right of contribution
(a) General ruleThe right of contribution exists among joint tort-feasors.
(b) Payment required.A joint tort-feasor is not entitled to a money judgment for contribution until he has by payment discharged the common liability or has paid more than his pro rata share thereof.
(c) Effect of settlementA joint tort-feasor who enters into a settlement with the injured person is not entitled to recover contribution from another joint tort-feasor whose liability to the injured person is not extinguished by the settlement.