Is using a water heater less effective than your plan (BTW it is 30gal.) I was looking to gather the components for yours, and then was offered a free water heater, and figured it is already assembled and well insulated.

However if you think it is less effective I can take it apart and use the element and thermostat.

I thought my oil was dry due to long settling time, usually a month. Then I used the HPT and found it too wet, so I will continue testing.

The simple handpump prefilter unit is designed to dewater wvo sufficiently for use as fuel. It was intended as a simple and inexpensive yet effective way to process WVO into fuel for those needing less than 140 gallons per week. It is much simpler and quicker to settle out suspended water once particulates larger than 10 microns have been removed.