The Vaughn Hydrastone-lined solar water heater offers a unique combination of features that make it the best choice for use with solar systems. The Vaughn Solar SEPCO SR water heater allows fluid from the solar collectors to circulate through a 20 square foot Solar Removable heat exchanger within the tank itself. The submerged heat exchanger provides the highest efficiency while saving space, installation time, and additional costs associated with a separate external heat exchanger.  This also has the potential for electric backup so you will never be out of hot water.

For three generations Vaughn has built water heaters of the heaviest gauge steel with seamless one-half inch thick Hydrastone lining and bronze fittings at all water openings. Vaughn's unique manufacturing process has continually combined this old fashioned quality with ongoing advanced technology in providing the longest lasting and environmentally friendly heater available.

This model is for use in open-loop, closed-loop or drain-back solar heating systems. It utilizes two 10K Ohm sensors to perform all temperature sensing functions. One sensor is installed on the hot-out collector header and insulated and connected with a sensor wire to the control terminal "COLL", the second sensor attaches to the storage tank or water heater and connects with a sensor wire to "STG" on the control terminal.

Additional functions available are pump circulation for freeze protection at 42°F on and 47°F off (additional snap switches may be added), or high temperature limit off at 160°F or 180°F.