Select Language: 

HotWat (HW)


Product Features

HotWat is an industrial/commercial grade self-regulating heating cable designed to compensate for the heat losses from hot water distribution systems.

When hot taps are infrequently used, the water resiidng in the distribution pipework cools ans is usually run to watse before hot water from the storage cylinder arrives at the tap.

HotWat will not overheat or burnout, even when overlapped upon itself. Its power output self-regulates in response to the pipe temperature.  Its self-regulating characteristics improve safety and reliability.

By applying HotWat to the pipework (beneath the thermal insulation), heatlosses are eliminated and the water is maintained at the required temperature.  Further savings are achieved by removing the recirculating pipework together with pumps and valves.
The installation of HotWat is quick and simple and the cable can be cut to match the exact length of the pipework.  It requires no special skills or tools. Termination, splicing and power connection components are all provided in convenient kits. See Product, Application and Documentation Links below.
  Click to see larger image
Thermoplastic Outer Jacket

  Click to send us an email Are you interested in HotWat ?
Click on the Icon to send us an email and someone will contact you.

Product Specification

Maximum Withstand Temperature 100°C (212°F)

HotWat is available in two systems. HWR is simply used to maintain pipework  at approximately 50-60°C, whilst HWP is used to maintain 45-70°C during normal operation with an extra disinfection feature at timed intervals to reduce riskd of legionella.

  Maximum Withstand Temperature 100°C (212°F)
  Maximum Energised Temperature 100°C (212°F)
  Power Supply 12 - 277 VAC
  Cable Dimensions 12.7 x 5.95mm +/- 0.5
  Minimum Installation Temperature -40°C (-40°F)
  Minimum Bending Radius 30mm
  Weight kg/100m 11.8 kg
  Maximum Resistance of Protective Braiding 18.2 Ohm/km
  Cable Gland Thread Size M20


Maximum Circuit Length (m)  for various circuit breaker sizes
Termperature (°C)
10A 16A 20A      
  HWR 18   56   92   128                  
    0   38   64   102   128              
  HWP 18   34   56   90   94              
    0   24   40   64   80              
For use with Type C circuit breakers to IEC 60898



Recommended Insulation Thickness (mm)
Termperature (°C)
Size (mm)
  HWR 60   25   30   40   50   60   75      
    55   20   25   30   40   50   60      
    50   15   20   25   30   40   50      
  HWP 45-70   30   40   50   60   75   75      
Above figures based on the thermal insulation having a K-value of 0.038 W/mk at 35°C mid-point temperature.


Approvals and Certification
FSR, FSP 114665
EU DoC HotWat, HW
Product and Application Datasheets
HotWat Datasheet

Latest News

  • Heat Trace - 'going the distance'      More... | 27 July 2015
  • Heat Trace Ltd November new starters      More... | 21 December 2017
  • National Apprenticeship Awards 2019      More... | 13 December 2019
  • BEWARE - COUNTERFEITERS      More... | 15 June 2010
  • Heat Trace Ltd - July - September new starters      More... | 27 September 2017
  • 2017 New starters      More... | 22 June 2017