Our boat's hot water heater
is located such that it is higher than the radiator filler cap and expansion tank of our Yanmar
auxiliary. I want to hook up the engine heater ports
of the hot water
heater to the engine cooling
I've read that I will need to add a header tank with radiator cap at, or slightly above, the elevation of the hot water heater in order to avoid air bubbles and also to allow me to add coolant
as needed. This all makes sense to me.
below seems like an easy way to accomplish this. I don't see the need for a header tank, just a filler cap. This unit comes with a nipple to attach the small hose to the expansion tank.
So my plan is to cap off the existing hose for the expansion tank and relocate it up near ether hot water heater. I will then buy one of these remote
filler caps (if not this exact one, then something like it). The filler cap and the expansion tank will both be mounted near the hot water heater.