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Used Williams & Davis Boiler Inc. 150 HP Classic 2 Pass Dryback Firetube Boiler. Model # 780. BTU Input 6,300,000. W & D S/N 8954. Electrical current for controls is 1/60/120 volt. Motors are 3/60/460 volt. Contains 118 tubes that are 2 1/2" diameter X 117" long. Natural gas fired burner model No. S12.1-G-50. Firing rate Max MBH 6300, Min MBH 1575. Manifold pressure (in W.C.) Max 6.0", Min 0.5". Rated 150 PSI. Built 2002.Click to view YouTube video 1Click to view YouTube video 2Click to view YouTube video 3Additional Prep Fees May Apply