5-272-04-042-001

Built around a double-wall two-pass U-bend bundle, 5-272-04-042-001 delivers in-tank heating with steam in the tubes and cross-contamination protection for demanding service. The vented air gap between tube walls gives a visible telltale leak rather than allowing tank contents and steam to mix. Physically, the unit runs a 4-inch shell in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. The build specifies cast iron bonnets, steel shell, and copper (double wall) tubes. Design ratings run to 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature. Installations range across institutional water storage, potable water storage tanks, and food-grade process tanks. Diamondback double-wall tubes are offered in copper, 90/10 copper-nickel, and 316 stainless, and the assembly is UL Listed for potable water service.