firebrick

[fairplumber]

Got a deal on some used firebrick but its from a thirty year old boiler would this be considered heavy duty brick and not be good for a pizza oven?

[Mingy]

I actually bought new heavy duty firebricks, so I don't think neccessarily they are a bad thing to use.

I would want to be really certain the bricks aren't somehow contaminated (heavy metals, aspestos, etc.), though ...

[brickie in oz]

Id be checking out what was the boiler was boiling and what type of fuel was used.

HD firebricks are fine to use if all is ok with no contaminants.

[fairplumber]

Thanks I reconsidered and will be buying new medium duty bricks. I can't wait to get started my wife says I have to wait till after new years to start. Just researching everyday and getting my plan together