Will Vitrified Clay Pipe withstand 2000 degree temperatures? in the heat/effluent conduit after the riser chamber on the way to the chimney? I just saw Sally's string on this, so I am modifying my question to just focus on the piping after the heat riser chamber, when a lot of heat would be dissipated into the room. I am just looking for your thoughts on using 8" VCP to build the rocket mass heater for my greenhouse. Thanks in advance, Jerry