Dart over heating???

Badsport said
How long should it take to warm to 180*, 5 minutes? They are small holes, and I did it to keep the system from getting air pockets. It seems to work.

It depends on your starting ambient temperature. Are you talking summer or winter? Takes a few minutes longer in winter, especially Michigan.

That is like saying room temperature. It doesn't matter what temperature a room is at, it is still at "room temperature"...