DBDWXL Dual Coil Double Wall (leak detection) Coil Indirect Water Heater

Dual Coil and Double Wall Extra Long coil with visible leak detection are engineered to minimize the chances of cross contamination of your potable water. These tanks are ideally suited for installations that are running glycol or similar products through the heat exchanger that may contaminate your drinking water. DBDWXL coil tanks should be run on higher boiler temperature to ensure your sufficient supply of hot water. Dual coil tanks will allow you to operate on lower heat input from the boiler without sacrificing volume of hot water required for your lifestyle. Alternately you may use the bottom coil for hot water whilst using the top coil to supply heat to your radiant floor or hot water radiators. Dual coil tanks integrate perfectly with solar, geothermal, wood stoves and other alternative energy sources lessening the burden on the environment and saving money. The tank is equipped with a ¾” fitting allowing for a re-circ line or alternately for powered titanium anode (purchased separately) for those that have problems with (Smelly Water) or aggressive water and water quality concerns. AMI tanks are constructed from heavy gauge 316L Stainless Steel that is further pickled and passivated for superior longevity and corrosion resistance. Leading the way with the best in the industry 2.5″ thick “R”value -16.5 H/CFC-free polyurethane insulation exceeds all code requirements for standby losses.


  • Extra long coil for faster recovery rates
  • Double wall leak detection minimizes cross contamination
  • 2.5″ Polyurethane Foam Insulation  “R” Value 16.5

(Eliminates the need for after-market blankets)

  • 100% high quality 316L stainless steel construction
  • Pickled and Passivated for superior longevity and corrosion resistance.
  • High capacity storage for commercial and industrial applications
  • Designed for quick and simple installation
  • Powder coated steel jacket for high quality finish and durability
  • Customized tanks available upon request
  • Complete package with aquastat, s/steel aquastat well, temp-pressure relief valve and tee drain valve **drain not supplied with 120gallon tanks


Maximum Operating Pressure:

Shell: 150 PSI
Coil: 150 PSI

Limited Warranty:

15 years on residential tanks
5 years on commercial tanks

120 DBDWXL shown


Double Coil / Double Wall (for leak detection)

(US Gal)
Heating Surface
(Sq. ft)
Coil Length
Shipping Weight
Bottom Top
J60 DBDWXL 60 14.4 14.4 40 215
J80 DBDWXL 80 14.4 14.4 40 315
J120 DBDWXL 119 14.4 14.4 40 380