ok, so can I trust plastic fittings? It doesn't look like I have an option. I'm trying to find an adapter for the coolant hose to the FPHE, 5/8 hose barb to 1/2" male. This is what I found but only in plastic.
http://www.mcmaster.com/#barbed-tube-fittings/=7ykt9j
Will this be ok for hot coolant? Sorry, that link won't take you right to it. Here's the part number from McMaster Carr: 5463K129