It all started with a 10
gallon Rubbermail cooler
There are many places both
locally and online to find one.
Home Depot often carries them...
|A piece of copper from a craft store for the grounding ring.|
|Drill a hole to fit the ring over a water heater element.|
|Cut out a ring.|
|Finished grounding ring with tab|
|Drill a large hole through the outer membrane of the cooler.|
|Cut away the insulation.|
|Drill a hole just smaller than the threads of the heater element.|
|Using a water heater element wrench (pictured) screw the element, gasket and grounding ring through the hole. Seal well with silicone.|
|Screw the element tight from inside with a threaded pvc fitting cut to make a nut. Seal with silicone.|
|Drill and burrow from the side of the cooler for your power cord.|
|Connect power leads with crimp connectors and soldier the ground wire to the ring.|
|Seal a pvc cap in place with silicone.|
|With sight-glass and thermometer added here is the finished HLT.|
5 gallons of water were brought to 170F in just over 30 minutes.
We are at 2,500ft, my thermometer is a few degrees off and the thermometer probe is located near the lower edge of the tank. Those three factors, I think, explain why the water was boiling at the end of the element yet the temperature was reading less than 190F.