No. 92-15749

38 F.3d 1467 147 L.R.R.M. (BNA) 2577 , 129 Lab.Cas. P 11,213 UA LOCAL 343 OF the UNITED ASSOCIATION OF JOURNEYMEN & APPRENTICES OF the PLUMBING AND PIPEFITTING INDUSTRY OF the UNITED STATES AND CANADA, AFL-CIO; UA Local Nos. 159, 342, 343, and 444 Combined Pension Trust Fund; UA Local Nos. 159, 342, 343 and 444 Combined Health & Welfare Trust Fund; and UA Local No. 343 Journeyman and Apprentice Training Trust Fund, Plaintiffs-Appellees, v. NOR-CAL PLUMBING, INC.; Elmar Lee Pettit; North Bay Plumbing, Inc.; Audrey Jean Pettit, Defendants-Appellants. No. 92-15749. United States Court of Appeals, Ninth Circuit. Argued and Submitted Dec. 16, 1992. Decided Oct. 14, 1994. John M. Kelson, Oakland, CA, for defendants-appellants North Bay Plumbing, Inc. and Audrey Jean Pettit. Mark R. Thierman, Thierman, Cook, Brown & Prager, San Francisco, CA, for defendants-appellants Nor-Cal Plumbing, Inc. and Elmar Lee Pettit. John J. Davis, Jr., McCarthy, Johnson & Miller, San Francisco, CA, for plaintiffs-appellees. Appeal from the United States District Court for the Northern District of California. Before NORRIS, BEEZER and KLEINFELD, Circuit Judges. WILLIAM A. NORRIS, Circuit…