How far away from Stove Pipe to Hopper

In the works of piping my bottom vent pocono to the chimney. How far are people keeping the stove pipe riser from the bottom vent away from the hopper? I have 8 inches right now - is that sufficient so that heat from the pipe does not start the coal in hopper on fire?

Shouldn't be a problem. I think My pipe on my hyfire is about the same. The pipe itself won't get that hot on the outside. maybe 200 degrees. You need a lot more than that to ignite coal. It's more making sure you have enough clearance for loading and servicing it.

You need to get the coal burning back on the grates and have low draft to get a hopper fire, and normally it just smolders, IF you even have one. Don't get alarmed, it is NOT a real common thing, but does happen.

Hi Cold M,
The pipe can be touching the hopper without danger. As Dave stated, it's a pain to pour in coal with the pipe too close.
Jerry

Thanks Guys. I was looking at it and left it 8-inches just so it would be easier to fill the hopper like you said.