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Sun Earth  |  SKU: 100004-8-80

SunEarth DrainPack Hot Water Station 80 / 120 Gallon

Regular price $10,901.52
Shipping calculated at checkout.
Tank Size

SunEarth DrainPack Hot Water Station – 80 / 120 Gallon Solar Drainback System

The SunEarth DrainPack Hot Water Station is a factory-assembled solar thermal hot water system engineered to simplify the installation of drainback solar water heating systems. Designed for seamless integration with SunEarth's Cascade drainback collector systems, the DrainPack HWS arrives pre-plumbed and hydraulically tested, reducing installation time while improving long-term reliability.

The system combines a glass-lined storage tank, an integrated 6-gallon all-copper drainback reservoir, stainless steel circulator pump, differential temperature controller, mixing valve, expansion tank, and service bypass valves into one professionally assembled package. During normal operation, water drains safely back into the reservoir whenever the pump stops, providing reliable freeze protection without relying on glycol.

Ideal for residential applications in cold climates, the DrainPack HWS offers dependable domestic hot water production while maximizing solar energy efficiency through a durable, low-maintenance drainback design.

⚙️Key Features:


Feature Benefit
80 / 120-Gallon Solar Storage Tank Provides ample domestic hot water storage
Factory-Assembled Hot Water Station Reduces installation time and field connections
6-Gallon Copper Drainback Reservoir Passive freeze protection through gravity drainback
Copper Double-Wall Heat Exchanger Efficient heat transfer while protecting potable water
Stainless Steel 3-Speed Circulator Pump Reliable and energy-efficient circulation
Differential Temperature Controller Automatically optimizes solar collection
Thermostatic Mixing Valve Factory set to 120°F and adjustable from 90°F–130°F
Integrated Service Bypass Allows backup water heater operation during maintenance
Glass-Lined Steel Tank Corrosion-resistant, long service life
Genuine SunEarth OEM System Designed specifically for SunEarth drainback solar systems


⚙️Technical Specifications:


Specification Details
Tank Capacity 80 / 120 Gallons
Product Dimensions 68" H × 29" L × 24.5" W
Product Weight 273 lb
Manufacturer SunEarth
Part Number 100004-8-80
Product Type DrainPack Hot Water Station
Drainback Reservoir Capacity 6.0 Gallons
Tank Construction Glass-Lined Steel Vessel
Tank Insulation 2" Non-CFC Foam Insulation
Heat Exchanger 5/8" Nominal Copper Double-Wall Tubing
Circulator Pump 1/12 HP Stainless Steel, 3-Speed
Mixing Valve 3/4" Lead-Free Bronze
Expansion Tank 2.1 Gallon Potable Thermal Expansion Tank
Potable Plumbing Connections 3/4 in.
Input Voltage 120 VAC
Maximum Solar Power Input 150 Watts
Optional Backup Heating Element 4,500 W @ 240 VAC
Maximum Collector Area 96 sq. ft.
Maximum Building Height 20 ft.
Controller LCD Differential Temperature Controller
Application Residential Solar Domestic Hot Water
Warranty 2-Year Limited

⚙️Technical Documents:

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