
    Jaffe Plumbing & Heating Co., Inc. et al., Appellants, v. Brooklyn Union Gas Company et al., Respondents. Local 101, TWU, AFL-CIO, Intervenor-Respondent.
    Argued February 16, 1970;
    decided March 4, 1970.
    
      
      Abraham Wilson and David M. Potts for appellants.
    
      J. Lee Rankin, Corporation Counsel (Irving Genn and Alfred Weinstein of counsel), for City of New York, respondent.
    
      Robert B. Lisle, Thomas M. Lamberti and Barbara M. Suchow for Brooklyn Union Gas Company and others, respondents.
    
      Belle Harper and I. Philip Sipser for intervenor-respondent.
    
      William J, Corcoran for Local 15, 15A, 15B, 150, 15D, International Union of Operating Engineers, AFL-CIO, amicus curiae.
    
   Concur: Chief Judge Fold and Judges Burke, Scileppi, Bergan, Breitel, Jasen and Gibson.  