5-272-12-042-001

Configured for in-tank heating with steam in the tubes and cross-contamination protection, this configuration carries the double-wall two-pass U-bend bundle construction that defines the Diamondback tank heater range. 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 12-inch shell, 42-inch shell length in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. Standard construction uses cast iron bonnets, steel shell, and copper (double wall) tubes. On the ratings side, expect 150 PSI on the shell side, 125 PSI on the tube side, and 375°F maximum temperature. This build is designated 5-272-12-042-001. Typical duty includes institutional water storage, food-grade process tanks, and domestic hot water storage under double-wall codes.