[KS Cleaning]

not advisable to use red diesel on them

On yeah, there was a thread about the perils of using red diesel in your heater.
I think it caused a coking issue due to the additive in the red.

Biggest problem with using red is that it would invalidate any warranty you had.

[NWH]

There’s only 1 fuel line going into the-a tank it just needs to be submerged in the tank the small webasto pump sucks fuel through the pipe and into the heater it’s as easy as that,it’s the same principle with a marine tank inside the vehicle.