All HeatTrak Residential Mats connect with one another using their built-in watertight connectors. In some instances, you may need a 20-Inch Cable Extender to create longer cable connections between mats.
 
20"  HeatTrak Watertight Cable Extender are often required when your HeatTrak path turns a corner, or raise up a step.  If you discover you need a 20" extender after receiving your order we will ship you one for our cost. Contact us for help.