5-277-08-030-001

For in-tank heating with boiler water in the tubes and cross-contamination protection, the Diamondback tank heater line offers a double-wall two-pass U-bend bundle design; this configuration sits within that range. The vented air gap between tube walls gives a visible telltale leak rather than allowing boiler water and tank contents to mix. Physically, the unit runs a 8-inch shell in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. As furnished, materials include cast iron bonnets, steel shell, and copper (double wall) tubes. On the ratings side, expect 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature. Installations range across potable water storage tanks, institutional and health care water storage, and domestic water storage under double-wall codes. This build is designated 5-277-08-030-001.