The WD Series 4000 includes the 4-pass, dry and water-back design. Our 4-pass design provides high flue gas velocities and low stack temperatures to maximize its performance. Series 4000 provides the complete package; pressure vessel, integral burner and controls including leading water level control and temperature regulating technologies. With nearly ninety years of combined design and manufacturing experience, Williams & Davis set out to incorporate good customs and practice into modern design and construction methods. With quality second-to-none, the Series 4000 is another safe, reliable, and easily maintainable boiler.
