We are having this conversation in the RV pump thread in Sanitation and Equipment.
Here is my post from over there.
I used this pump.
It says 160F max, but you can get a high temp kit for it. Even without the kit I have never had a problem. It has a rubber impeller and a SS and brass pumping cavity. NO PLASTIC !
This pump is variable speed on a dimmer switch and its totally self priming.
Its a great pump for the job.