Bobsticle
De Villes Advocaat
I teed into mine. Not had any issues. I think your brave not boxing the heater in. Be nice to see how long it lasts.I would be interested to know peoples views on a tee into the fuel line for supply, feed or return ? or drill one of the plates in the top of the tank (maybe gauge) and pop a pipe in there for the heater pump to draw on.