Leading the way in freeze protection
Retro-DWS is an advanced internal self-regulating tubular heating cable system that is used for efficient and reliable pipe freeze protection of non-pressurized drain, waste, and sewer pipe applications. Retro-DWS is a unique and patented conductive tubular heating system designed to provide internal freeze protection for existing problematic drains, sewers, culverts and other pipe systems without the need to excavate. Retro-DWS systems are delivered complete with industry certified plumbing components and Heat-Line’s advance self-regulating heating cable technology factory installed inside a high density polyethylene pipe with a proprietary fusion end seal. Supplied job-ready to internally heat trace common 3 inch and 4 inch septic and sewage pipe applications, the Retro-DWS can also be easily adapted to fit larger pipes with readily available plumbing components. The Retro-DWS is a fully serviceable product that can be used to prevent freezing or as a precautionary system to energize only if a freeze up occurs.
Retro-DWS is the only heating cable system designed to internally protect non-pressurized drain, storm drain, culvert, waste and sewer systems. These applications include but are not limited to septic drains, septic tanks, holding tanks and other similar applications.
The Retro-DWS heating cable is a job-ready, pre-assembled system that is a safe and reliable solution for non-pressurized drains. This includes but not limited to storm drains, culverts, waste and sewer systems consisting of all pipe types including all metallic and non-metallic materials.
The Retro-DWS is manufactured using a pre-determined length of Heat-Line certified, self-regulating heating cable, factory installed inside a ½ inch HDPE tube finished with a proprietary fusion end-seal. The purpose of the HDPE tube is to provide a barrier from fluids such as grey and black water, while providing extremely efficient heat transfer. The system will easily push inside most pipes for distances up to and greater than 150 feet (46 meters). For long distances Retro-DWS can be drawn in with an electrical or plumbers fish tape or rope. The Retro-DWS is supplied with certified plumbing fittings to interface with 3 inch and 4 inch ABS pipes using an existing or installed clean-out, Tee or Wye as an access point.
The versatile interface process of the Retro-DWS makes the system suitable for installation in pipe diameters from 3 inches to greater than 8 inches. The Retro-DWS can be easily adapted to fit larger pipe diameters by using readily available, industry standard components. In larger pipe applications, Retro-DWS is designed to provide a melt-water path, thus allowing continuous flow through the entire channel. This allows the fluids to carve their way through large diameter culverts or drains without having to install energy-expensive high watt density heating cables. For large pipes diameters please review Retro-DWS ‘other methods’ in the installation manual.
Even in applications where the pipes are intended to be dry for short or extended periods of time, the Retro-DWS presents no danger of overheating or melting the pipe, making it suitable for all metal and non-metal drain lines that do not always contain liquids.
Retro-DWS can be used as a system to prevent freezing or as a precautionary system to use only if a freeze-up occurs. The Retro-DWS is a fully serviceable product. If a blockage occurs, the entire heat system can be removed and re-installed.
Retro-DWS employs the unique and advanced performance of self-regulating heating cable technology. Constructed of self-regulating heating cable technology the Retro-DWS can effectively increase heat and energy output to sections along its length which are cold and simultaneously reduce heat and energy output to sections which are warm. You never have to worry about the Retro-DWS heating cable overheating causing risk of melting and fire because of the self-regulating heating cable technology. Retro-DWS gives you the peace of mind of reliable freeze protection without the risk. It has become an essential product for home owners, engineers and building maintenance professionals to provide safe and reliable freeze protection in specialized applications.
To further increase the energy efficiency of your Retro-DWS heating cable system, it is recommended to add thermal insulation and a thermostat. The additional thermal insulation works to reduce heat loss, and the thermostat allows you to duty cycle your Retro-DWS system based on external pipe temperature. Both accessories combined can increase energy efficiency by as much as 80%.
The Retro-DWS is engineered to keep drains from freezing in serious climate conditions. The use of this product and its compatibility with a particular application is at the complete discretion of the user. The Retro-DWS tube may obstruct certain materials, especially solids in gravity fed drains. As such the Retro-DWS is designed to be serviceable, and Heat-Line recommends a service schedule if there is a concern of impediments.
Retro-DWS is an internal heat tracing system designed to provide reliable freeze protection of metallic and non-metallic pipes. Examples include but are not limited to;
Retro-DWS can be found providing freeze protection in many of the following places:
As Retro-DWS is a unique, high quality product, it can be utilized in many unique applications. If you feel you have a special or unique application for Retro-DWS please contact Heat-Line directly and speak with one of our knowledgeable product specialists.
Always measure prior to ordering, do not assume or estimate the length required.
Retro-DWS is a custom order product however in most cases it can be shipped out within 3 days from time of order. Please call for current availability and lead times.
|HLA-120||120V plug-in thermostat (GFC)|
120/240V hard wire thermostat (CS)
|TIMER-120P||120V plug-in timer (GFC)|
|TIMER-240P||240V plug-in timer (GFC)|
120/240V hard wire timer (CS)
|MA-10||120/240V GFCI/ELCI (CS)|
|INSUL-3.00||Insulation sleeve for 3 inch ID pipe (3 1/2 inch ID, 6 ft long)|
|INSUL-4.00||Insulation sleeve for 4 inch ID pipe (4 1/2 inch ID, 6 ft long)|
|HLP-TAPE||Tape for insulation sleeves (100 ft)|
|INSUL-FOIL||Aluminum bubble foil insulation (16 in wide, sold by the foot)|
|INSUL-TAPE||All weather Aluminum foil tape (150 ft)|
|TORQ-60||No hub torque wrench automatic release at 60 IN. LB.|
|WARRANTY||Extended 10 year limited warranty|
A –There is no operational difference in efficiency but the Retro-DWS is designed for non-pressurized systems where the Retro-FM is designed for pressurized applications. The Retro-DWS fittings are suitable for non-pressurized pipes and GFC models are supplied with a 4 ft. (1.2m) power supply lead. Retro-FM is supplied with a male adapter fitting for use in pressurized pipes with pressures as great as 230PSI and supplied with a 20 ft. (6m) power supply lead.
A – Retro-Line is an approved system for internally heat tracing potable water supply pipes and sump pump lines. Retro-DWS is designed for safe and approved installations inside septic pipes and other installations where methane gasses may be present or in large drains where mechanical protection of the heater is desired. The Retro-DWS is engineered strictly for non-pressurized applications where the Retro-Line is cCSAus approved for 75PSI.
A – The length of Retro-DWS heating cable that will be required can change from application to application. In most applications the entire pipe length is protected to prevent any chances the pipe could freeze further down the pipe.
A - Care should be given when determining product length required however if required length is less than what was ordered you can shorten the overall system length by extracting the heating back through the entry grommet. It is recommended to contact Heat-Line to speak with a product specialist for details on this procedure.
A – No. The Retro-DWS system manufactured by Heat-Line is a pre-assembled factory terminated advanced self-regulating heating cable system that is not designed to be field terminated and or tailored to length.
A – No. The Retro-DWS system manufactured by Heat-Line is a pre-assembled advance self-regulating heating cable system that includes a proprietary end-seal termination. As such the Retro-DWS system cannot be spliced together or altered in the field. If a greater length of the Retro-DWS is required you may purchase a single continuous product of the proper length, and or relocate a second power source and install an additional Retro-DWS system to complete the required freeze protection.
A – Yes. The maximum circuit length of Retro-DWS that is allowed on a 120V circuit is 220ft. (67m), and 540ft. (165m) on a 240V circuit.
A – The Retro-DWS heating cable system manufactured by Heat-Line is available directly through Heat-Line and or any of our Heat-Line product distributors. For a list of Heat-Line product distributors in Canada and the United States please contact Heat-Line directly on our toll free number at (800)584-4944.
A – No - Energy efficiency has nothing to do with the designated voltage. We pay for the energy in watts, not in volts. Years ago the term more efficient was attached to 240 volt systems because you can put more load or amperage on a 240 volt circuit. Unfortunately the term more efficient somehow became misinterpreted to mean more energy efficient which is not the case.
A – Heat-Line provides proper and easy to follow installation instructions with all of our products, and offers market leading technical support. As a result, most Heat-Line systems, including Retro-DWS can be installed by homeowners; however, Heat-Line commonly recommends that a qualified tradesperson complete the installation process
A- All Heat-Line brand systems including Retro-DWS employ Heat-Line’s advanced self-regulating heating cable technology which operates to deliver energy and heat output to areas of the pipe that are cold and reduces energy and heat output to areas which are warm. While the overall amount of energy consumed depends on multiple factors you can be assured that you are installing the most energy efficient heating cable system available. If you would like to reduce your energy consumption further you can investigate the addition of a thermostat, timer, and or other control device.
A- The Retro-DWS system is safe for use with all metallic and non-metallic pipes. The advance self-regulating technology employed in the Retro-DWS product renders it safe on plastic pipes even when dry as it can never overheat and damage the pipes.
A - A thermostat is not included with the Retro-DWS product as they are not required for proper and safe operation; however, a thermostat can be purchased as an additional accessory. Depending on system applications, or where automatic operation is preferred, a thermostat can be used to switch the system on and off to help conserve power or to duty cycle the system. When combined with insulation thermostats can substantially increase energy efficiency.
A – Insulation is highly recommended when using the Retro-DWS system, especially if the installation is above ground in ambient outdoor air. Insulation helps reduce the overall heat loss and therefore reduce the amount of energy the Retro-DWS heating cable must consume. If the pipe is already buried, there is no need to dig up and expose the pipe to apply insulation.
A – Heat-Line recommends to use insulation that is best suited to the environment in which it is going to be installed. A common type of insulation employed with Retro-DWS heating cables is fire resistance water proof pipe foam insulation sleeves.
A – No. Retro-DWS self-regulating heating cable systems increase heat output with cold but more importantly, decrease heat output with warmth. As a result, Heat-Line brand products are very energy efficient to operate, but do not completely shut off as they can only idle their output to a minimum amount. To completely shut off the system it must be unplugged or installed with a thermostat. Heat-Line brand systems should be unplugged or shut off when not required (summer months).
A - Heat-Line products including Retro-DWS are designed to turn back on as soon as the power to the unit is supplied. Once re-energized the Retro-DWS system has the ability to increase its output to immediately begin to defrost any section of the pipe that has or was close to freezing during the power outage.
A – The indication light located on the GFCI device included with all GFC model Retro-DWS systems verifies that power is provided to the GFCI device and that the GFCI is allowing power to pass through to the heating cable device.