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120 gallon StorMaxx SDB Domestic Hot Water DrainBack Tank

120 gallon StorMaxx SDB Domestic Hot Water DrainBack Tank

SKU: StorMaxx-SDB-120-1HX

7,260.00 $3,630.00

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Product Details & Specifications

Weight field_209 lbs
Dimensions field_203

120 gallon StorMaxx SDB Domestic Hot Water DrainBack Tank

Our StorMaxx SDB Solar Storage Tanks are made with extremely durable materials with a high-tech titanium steel/porcelain enamel bond that is expected to last 15 years or more. Our spirally augmented copper coils allow extremely efficient heat exchange within the tanks. Our outer jacket made from painted alloy steel provides a very clean look to the system. We use polyurethane insulation for maximum heat preservation.

Our tanks come in two sizes to meet most household and small business domestic hot water needs. By connecting more tanks the systems are expandable to larger applications. The StorMaxx SDB includes all the major components of a residential drainback system.

How Does It Work?

The sun heats the solar collector on the roof.The temperature sensors read that the collector is a higher temperature than the water in the storage tank.The controller turns on the pump sending solar water from
the storage tank to the collector to pick up the extra heat and return it to the tank.As long as the temperature in the collectors remains higher than the tank temperature the system continues to run until the set maximum tank temperature is achieved; Then the pump shuts off and the solar water drains back to the tank.The cold domestic water is plumbed through a copper heat exchanger submerged in the tank. When hot water is turned on in the building the cold domestic water is drawn through the heat exchanger and picks up the stored heat in the tank and comes out hot.If the solar collectors are still hot as the temperature in the tank drops the solar water is pumped back up to the collectors where it is once again heated by the sun.In freezing climates the solar water will remain in the tank until the collector temperatures achieve levels above the tank temperature. As the collector temperature falls toward freezing the system turns off and the water drains back to the tank leaving the collectors and pipes completely empty.


  • High Quality One Tank System
  • Pre-Assembled for Fast Installation
  • Efficient – Only One Pump to Run Only One Tank to Heat
  • Hot Spring Heat Exchanger
  • Fully Automated Drainback Controller
  • Long Life Wilo Pump
  • Works with Tap Water
  • Closed System Requires Little Maintenance
  • Save Time and Money on Installation
  • Multiple Sizes to Fit Most Homes and Small Offices

Tank Specifics

  • Titanium Steel Plasma Welded Inner Tank
  • Porcelain Enamel Lined Baked at 1650°F
  • Features a 5 Year Warranty with Expected Life of 15 Years or More
  • Two Inches of Polyurethane Insulation R=15
  • Premium Alloy Outer Jacket
  • P/T Valve
  • Magnesium Anode Rod for Corrosion Protection
  • Temperature Sensor Ports for Accurate Readout
  • Available in 80 and 120 gallon
  • One Heat Exchanger Coil
  • Heat Exchangers are Spirally Augmented Coils for Extremely Efficient Heat Exchange

Need Assistance?
If you have questions need help or simply feel uncomfortable placing your order online feel free to contact the product representative at 1-800-786-0329.


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Silicon Solar
2917 State Hwy 7
Bainbridge, NY 13733
P: 1.800.786.0329


Why Shop With Us

Why Shop With Silicon Solar

Silicon Solar is, and always will be, a family owned and operated solar company dedicated to providing the highest quality solar powered products which have completed our rigorous quality inspection. We also manufacture a full line of solar powered products right here in our production facility; enabling us offer faster delivery and priority technical support.

Search our online catalog for hundreds of solar lights, solar fountains and many other products, including solar cells and solar panels. We also manufacture custom solar kits upon request for professors and educational programs.

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Silicon Solar
2917 St Hwy 7
Bainbridge, NY 13733

P: 1.800.786.0329

Contact Silicon Solar