Winter IS here! So I just wanted to share something I made for heating WVO in-tank.
Basically cost about $35 dollars. Its made out of flexable metal gas line I purchased at the hardware store. As well as some brass fittings to connect to the coolant lines I have running to the tank. A little hardwork (Ok most of the hardwork was getting the damn fuel tank out! Its a 60gallon size tank, and was covered in layers and layers of dirt).
The only things I found equivalant to what I wanted cost about $200 bucks! Yikes!
The coolant lines (copper tubing I purchased at the hardware store as well as the compression style fittings) also run next to the fuel lines which has the benefit of heating the fuel lines.
Im considering insulating the copper lines next to the fuel lines. You think that hardware 'expanding foam' stuff would work?
P.S. make sure you use thread sealant when connecting this stuff together. I found that out the hard way after I already put the gas tank back in, started her up and realize that it was leaking coolant out of the fittings