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Solar Water Heater

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Solar Water Heater
Solar Series
Model SRW  (65-119 Gallon Capacity)
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Save Money Using Renewable Energy

The American-made Vaughn Solar water heater is designed for use with a wide range of solar and multi-fuel system configurations. Heavy gauge steel construction paired with Hydrastone cement lining ensures long life. Premium CFC free polyurethane foam insulation provides a high level of efficiency and allows for very low heat loss, ensuring that the energy captured from any heat source remains in your system. Available model configurations include single or dual finned copper heat exchanger coils mounted on isolating, double O-ring flanges to allow for maximum heat transfer rates, while maintaining tank integrity and protecting against electrolysis.


Heavy Duty Construction

  • Hydrastone cement lining provides long tank life
  • Plastic jacket will not rust, scratch or dent, eliminating damage and is maintenance free

High Efficiency

  • Industry's lowest standby heat loss reduces your operating costs

Removable Heat Exchanger

  • Field removable all copper heat exchanger is mounted on double O-ring flange, isolating the heat exchanger and eliminating the risk of electrolysis, while providing maximum hot water output

No Sacrificial Anode Rod

  • Reduces operation expenses by eliminating periodic inspection and replacement costs associated with maintaining an anode rod

Warranty Information

  • 7 year limited tank warranty
How It Works Tank Configurations Solar Installation Diagram

Field Removable Heat Exchanger

Conveniently located and simple 8-bolt flange design for ease of installation and service. This superior design allows for periodic cleaning of coil to maintain maximum performance.

Heat Exchanger Coil

Tank Specifications

Model Storage
Overall Dimensions
First Hour Rating (Gallons) Continuous Rating (Gallons Per Hour) Back-Up Electric Heater
(240V 1PH) Watts
Height Diameter Single Wall Double Wall Single Wall Double Wall
3/4" Coil 1" Coil 3/4" Coil 3/4" Coil 1" Coil 3/4" Coil
S65SRW20145 65 47 7/8" 26" 299 210 295 120 150 235 60 4500w
S80SRW20145 80 58" 26" 325 222 307 132 150 235 60 4500w
S80TSRW2014545 80 71 3/4" 19" 340 222 307 132 150 235 60 4500w
S120SRW2014545 119 69" 28" 410 254 339 164 150 235 60 4500/4500w
DOUBLE COIL (Bottom Only)
S65SRW20245 65 47 7/8" 26" 299 350 512 179 285 447 114 4500w
S80SRW20245 80 58" 26" 325 365 527 194 285 447 114 4500w
S80TSRW2024545 80 71 3/4" 19" 340 365 527 194 285 447 114 4500w
S120SRW2024545 119 69" 28" 410 405 567 234 285 447 114 4500w
DOUBLE COIL (Top and Bottom)
S65SRW202TB45 65 47 7/8" 26" 299 390 512 155 225 447 90 4500w
S80SRW202TB45 80 58" 26" 325 305 527 170 225 447 90 4500w
S80TSR202TB45 80 71 3/4" 19" 340 305 527 170 225 447 90 4500w
S120SRW202TB45 119 69" 28" 410 345 567 210 225 447 90 4500w
S80SW4545 80 58" 26" 325 92 - - - - - 4500/4500w
S80TSW4545 80 71 3/4" 19" 340 92 - - - - - 4500/4500w
S120SW4545 119 69" 28" 410 122 - - - - - 4500/4500w
Notes: Cold water inlet size 3/4" Male NPT, Hot water outlet size 3/4" Female NPT, T&P relief valve 3/4" Female NPT. All recovery ratings based upon 40-120°F (80°FΔT) hot water when supplied with 180°F solar water.
Vaughn Coil Curves


  • Double wall heat exchanger
  • Back-up electric heating element for supplemental heating
  • 1.5" cold water inlet and hot water outlet
Build Your Model




Number of
Heat Exchangers

Heat Exchangers


Heat Exchanger Sq Ft.

Sq Ft. Heat Exchanger


Single/Double Wall



(Only on 2 Exchangers)

Model Number:

Solar Series Specific Questions

How does the heat trap work?

The Vaughn water heater is constructed with a heat trap installed within the water heater’s hot water outlet connection. This device helps prevent heat from escaping through the storage tank’s hot water outlet during standby periods, resulting in improved operating efficiency. The heat trap is constructed from a specially designed bronze nipple with an internal floating ball that during standby periods of no flow settles and closes off the storage tank thereby preventing thermal conduction of hot water radiating through the hot water outlet.

Is the Vaughn heat exchanger removable?

Yes. The heat exchanger is fully removable in all Vaughn indirect water heaters. The benefit to having a removable heat exchanger is that the coil can be removed for cleaning and de-scaling for improved performance and efficiency when used in hard water applications. It should be noted that the heat exchanger is not removable and the coil cannot be cleaned in many other indirect water heater brands.

Why is dielectric isolation so important?

The unique design of the Vaughn heat exchanger electrically isolates the heat exchanger from the tank by means of a non conductive barrier installed between the two. This provides dielectric isolation between the tank and the heat exchanger thereby eliminating electrolysis between the two due to dissimilar metals. This feature is one reason why the Vaughn indirect water heater far outlasts competitor models.

What is the average life of an electric water heater?

The most important factor related to the life expectancy of a water heater is the quality and type of storage tank. On an average the life expectancy of a glass lined electric water heater is about 10-12 years (according to the National Association of Home Builders 2007 Study of Life Expectancy of Home Components http://www.nahb.org/fileUpload_details.aspx?contentID=99359 ), compared to a cement lined electric water heater’s average life expectancy of 23-26 years (Independent study of over 25,000 installations for an Electric Utility). Of course, there are various other factors that affect longevity including pressure fluctuations, usage, water conditions, environmental conditions, etc.

General Questions

Are Vaughn heaters made in the USA?

Yes. Vaughn water heaters are all made in the USA and our factories located in Connecticut and Massachusets and qualify for incentives under The Buy American Act and the American Recovery and Reinvestment Act (ARRA). For more information go to the following link Here.

Where can I purchase a Vaughn water heater?

There are numerous ways to purchase a Vaughn water heater depending upon the model you desire and your geographic location. The easiest way is either to visit our "Where to Buy" option in the red menu bar across the website, or contact Vaughn directly at 978-462-6683 and ask for the sales department where you will be directed to either our local representative or our order entry department for quick and easy ordering.

What code requirements are applicable for my installation?

The installation of water heaters are mostly governed by the Uniform Plumbing Code (or CPC in California), Uniform Mechanical Code, and National Electrical Code. These are standard codes that are used across the United States, and each state can amend them as they wish. To take it further, each city and county jurisdiction has assigned one or more building officials with what is called Administrative Authority. This Authority" allows each jurisdiction the right to interpret the codes as they see fit. Because of this many cities differ on their requirements. Vaughn strongly recommends that you contract with a plumbing engineer who knows and understands the intricacies of the building code requirements for your location.

Is it OK if my plumbing system has plastic pipes (PVC or PEX)?

Yes. All Vaughn water heaters will work with both types of plastic piping.

My question is not found in these FAQ’s, where do I look next?

Check out the Vaughn Product Center at Here for a complete listing of all technical Operation & Maintenance manuals documentation available by model. Get easy access to Installation Sales Brochures Service Bulletins Wiring Schematics Parts Breakdowns and various other technical documents related to the full line of Vaughn water heaters. Or if you prefer please call us at 978-462-6683 and ask to speak with Sales.


Technical Documents

Many of our products literature is available online for download. To open these files, a PDF viewer is required. If you do not have one, Adobe provides Acrobat Reader free of charge for viewing only. Use this link to download Acrobat Reader. You may also choose to download the file to your PC for future reference or printing. On most operating systems, simply right-click on the links below, choose "Save target as..." or "Save link as...", choose a location and it will save the document to your computer for future reference.

Vaughn Water Heaters Logo
26 Old Elm Street
P.O. Box 5431
Salisbury, MA 01952-5431
Tel: 978-462-6683
Fax: 978-462-6497

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