DX Drainback System

Sku#: DX-SYS

Item Information

DrainBack System with Heat Exchanger.   Drainback solar thermal systems are maintenance free with excellent reliability.  They protect from freezing and overheating with fewer system components.  Non pressurized systems eliminates failure prone system components.  The water can be used as a safe and efficient heat transfer fluid. 

The Drainback Series is an indirect system. It is referred to as “indirect” because the sun, through a roof-mounted collector, heats fluid circulating in a closed-off solar loop which never comes in direct contact with usable water stored in an insulated tank. The heat exchanger wraps around the perimeter of the storage tank, heating the potable water in the tank.

  • Exceptional Efficiency
  • Single Wall Heat Exchanger
  • Protects against freezing
  • Protects against overheating
  • Active Heat Exchanger

Pre-Engineered DX Drainback Systems

DB System Part Number Storage Tank Collector(s)
DX-65-32 65 gallon one AE-32 Collectors
DB-80-42 65 gallon two AE-21 Collectors
DB-80-40 80 gallon one AE-40 Collectors
DB-80-52 80 gallon two AE-26 Collectors
DB-80-64 80 gallon two AE-32 Collectors
DX-120-64 120 gallon two AE-32 Collectors
DX-120-96 120 gallon three AE-32 Collectors

All Kits Contain:

Part Number Description
DB-10-10XC 10 gallon Stainless Steel Reservoir with 10 ft Heat Exchanger with Tank Stand
DTC-ES-1C Eagle Sun Differential Controller with 2 sensors
UP15-100F Grundfos Cast Iron High Head Pump
F-GF1526 3/4" NPT Cast Iron Flange Set
UP15-10SU7P Grundfos Stainless Steel Circulation Pump
BD-75 3/4" Boiler Drain Valve
AE-FM Flush Mounting Kit

Suggested Components:

Part Number Description
OST-65TSC or OST-80TSC or OST-120TSC Glass Lined, 4500 W Backup Heating Element, Top and Side Port
RF-50 or RF-75 Roof Flashing Set
MV-1170 3/4" FTP Mixing Valve
WH-TM24 Water Heater Timer
SK-5PLW or SK-12PLW Warranty 5 or 12 Year Premium Coverage on Service and Labor