Indirect Water Heater Specs


Hydrastone Cement Lined Steel



6 thru 120 Gallons






120 thru 480 Volt



1 Φ or 3 Φ Open Delta


Inlet Size:

3/4" Female NPT


Outlet Size:

3/4" Male NPT


Drain Size:

3/4" GHT


Relief Valve Size:

3/4" Female NPT


Relief Valve Type:

T&P, 210°F, 150 psi


Thermostat Range:

110-170°F (surface)



190°F Manual Reset


Design WP:

150 psi


Design TP:

300 psi



Copper Sheathed



  • Model E: 2" Polyurethane Foam
  • Model M: 3" Polyurethane Foam

Tank Warranty:

  • Standard: 5 Year Non Pro-Rated
  • Optional: 10 Year Non Pro-Rated


Electric Warranty:

1 Year



High Impact Colorized Composite



White with Black Trim



General Specifications


The Hubbell tank is all welded heavy steel construction designed for 150 psi working pressure and tested to 300 psi. Each tank is centrifugally lined with 1/2" thick seamless high density Hydrastone cement with guaranteed 100% coverage of all steel surfaces. All tank openings are non-ferrous solid copper-slicon and are resistant to the corrosive effects of hot water.


3/4" combination cold water inlet and drain, with non-corrosive strata flow diffuser which prevents incoming cold water from mixing too rapidly with the hot water in the tank and assures delivery of more hot water - not lukewarm water. A 3/4" hot water outlet with a uniquely designed built-in heat trap prevents heated water from radiating through the piping during standby periods.


Copper sheathed immersion heating elements with low watt density for prolonged life - up to 12 KW in 120, 208, 240, 277, 480 volt single phase. An adjustable surface thermostat operates in 110-170°F range.
Integral hi-limit with manual reset button for over-temperature protection is factory set at 190°F.
Upper and lower element configurations are factory wired for non-simultaneous operation.


Highly efficient thick polyurethane foam insulation meets or exceeds the requirements of ANSI/ASHRAE/IESNA 90.1-2007 standards for energy efficiency and heat loss.


The exterior protective jacket is constructed from high impact composite material which cannot rust or corrode and does not require painting.