GCTek Thermakoi heaters are just the thing when you need to easily heat your koi pond. The smallest unit the 1.5 KW unit plugs into a regular 115V outlet and the 2 larger sizes, 6 KW and 11 KW are hardwired (230V) into the built in junction box that comes with the units.
Made of 316 stainless steel and utilizing highly accurate electronic thermostats these units keep the water temperature constant. Installs easily and quickly - just plumb in line (2") entering the water at the end with the Safety flow switch and out the other end to the pond.
Warranty information: Stainless Steel Housing has a Lifetime warranty & the Electrical and Heating elements have 1-year warranty.
GCTek 11KW & 18 KW 230V Thermakoi Heaters are out of stock, ETA unknown