Profile: Willaims & Davis Boilers specializes in the manufacture of reliable firetube steam boilers and pressure vessels. Our boilers are built to exceed ASME code, in part because we use heavier tubes to ensure long life through varying water conditions. We offer a full line of Scotch marine, vertical tubeless, vertical tube blow-off separators and accessories. Our vertical tubeless firetube boilers are ideal for small space installations where volume, simplicity and reliability are critical. Four 3" x 4" handholes in the boiler allow for proper clean-out in all installations. Its other key features include steel lifting eyes, UL listed fuel train, burner & controls, NEMA 1 mounted & wired control panel, blow down valves and stainless steel jacket. Blow down separators are sized according to boiler operating pressure & blow-down valve size. Vents are sized to keep internal flash pressures to a maximum of 5 PSI. Boiler feed systems feature a heavy steel tank for extra-long life - 3/16" steel for 16" to 38" diameter tanks, 1/4" steel for 42" inch diameter tanks or larger. All tanks feature a bronze float valve inside the tank for hot water service with heavy duty copper float ball.