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Submersible Heaters are self-limiting PTC electric immersion heaters which are more dependable with extended service life and will not burn out in air, scale or sludge like traditional resistance heaters. Most models come supplied with a 10′ power cord and EasyPlug Connection. SmartOne® heaters come in either Titanium or 316 Stainless with sizes ranging from 1kW-5.6kW.