ST120-DW Stainless Steel Double Wall Coil Tanks (119 Gal.)

Current Stock:

Introducing the Tunstall Industries ST Series domestic hot water storage vessels. Made from stainless steel using high quality manufacturing techniques, our tanks do not require a lining or a sacrificial anode to protect against corrosion. The vessels are well insulated to reduce heat loss, and are fully recyclable to reduce the embodied carbon impact. The quality of the Tunstall ST Series is backed by a 10-year commercial warranty that’s twice as long as the competition, and available at a competitive price.


  • 316L stainless steel tank
  • 10-year commercial tank warranty
  • Pickled & passivated for superior longevity and corrosion resistance
  • Fully welded
  • No anode required
  • H/CFC-free 2.5" polyurethane (PU) foam insulation layer (R-16.5)
  • Insulated to exceed ASHRAE 90.1
  • Powder coated steel jacket
  • Customizable fittings upon request
  • 150 PSI operating pressure rating
  • Includes ASME T&P relief valve rated to 500,000 BTU/hr

Technical Details:

  • 119 gallons of storage
  • Double wall coil with visible leak detection
  • 135 GPH recovery @ 100°F DHW temperature rise
  • 3 PSI coil pressure drop at 20 GPM flow rate
  • Dry weight: 370 lbs­­­­­­­
  • 69" x  29"
  • 1.25" inlet/2" outlet
  • Max temperature: 200°F
  • Max pressure: 150 psi