DW Sales Reps now represents Agua Del Sol (Radco) in Las Vegas and Arizona

PRLog (Press Release) - Dec. 21, 2012 - A drainback system works on the "drain back" principle. When inclement weather or nightfall shuts down the system, the water in the solar-collector loop drains back into an indoor fluid reservoir by the force of gravity. The water is pumped into the collector piping whenever the system is reactivated. Heat energy is not wasted in heating the solar collector (as in recirculating systems). Cycling on partly cloudy days does not dump energy (as in draindown systems) since the collector fluid is stored in an insulated reservoir. Drainback removes all water from the solar collector and piping whenever the solar energy collection process is not active. Freeze protection is automatic and fail-safe.

The main components of the RADCO Drainback System are a water storage tank, a smaller tank that stores heat-transfer fluid (usually water), a solar panel collector that captures heat from the Sun, and a heat transfer system that transfers heat to the water tank.

Quality, Performance, RADCO

Tax Credits and Utility Rates Available

Radco has developed a mechanical-control package for drain-back systems. This Drainback Heat eXchange module (DBHX) is a factory-assembled unit which provides:

a single-walled heat exchanger,
collector fluid reservoir,
solar collector fluid circulator pump,
hot water booster circulator pump and
a differential temperature controller unit

..assembled into one attractive module. Most any solar collector and any water storage tank can be combined to form a drainback system!

Certifications and Compliances: IAMPO Listing No. S-1894

Los Angeles City Approval No. RR-4008

California Energy Commission & Arizona Solar Energy Commission

Radco DBHX 6000 Series Drainback Heat Exchange Modules

Operate a solar water heating system by transferring solar energy to a storage water tank.


The Radco DBHX 6000 series drainback systems have these strengths:

Allows most any solar collector and water storage tank to become a drainback system.

Modular design translates to lower labor costs for installation and less space requirements for installation.
Provides automatic and fail-safe freeze protection.
Works well in most climates.
Power is not required for the drainback freeze protection to work.
Does not need propylene-glycol to protect from freezing temperatures.
Low maintenance - No need for propylene-glycol or rust-inhibitor fluids translates to less maintenance requirements
The closed-loop to solar panels protect the collector's fluid passages from mineral build up caused by "hard" water --where water contains an excessive amount of dissolved minerals.
SRCC approved designs.