Ethel M.Pieraux;77;of Charleroi R.D.1 (Fallowfield Township;died Thursday;June 11;1992;at 7:05 p.m.in Mon Valley Hospital Inc.;Carroll Township. Born Jan.24;1915;in Charleroi;she was the daughter of the late John and Emma Bizel. She was Methodist by faith. In addition to her parents;she was preceded in death by her husband;Amil;four brothers;John;Thomas;James and Elmer Bizet;and four sisters;Bea Dawson;Eda Edelman;Frances Helon and Myrtle Bizet. She was the last surviving member of her immediate family. Surviving are three sons;Robert Pireaux of Charleroi R.D.1;Richard Pireaux of North Charleroi and Jerry Pireaux of Florida;10 grandchildren and 11 great-grandchildren. Friends will be received Saturday from 2 to 4 and 7 to 9 p.m. in the Carl J.Spallino Funeral Home;819 Fallowfield Ave.;Charleroi;where services will be held Sunday at 2 p.m. with Dr.Larry W.Wilson officiating. Interment will follow in Belle Vernon Cemetery. Arrangements are being handled by the Carl J.Spallino Funeral Home.