I'm trying to install a wood stove into a kitchen/ get together building of mine. Please forgive my ignorance as I am from the south and we don't have to burn much wood. The walls are cinder block and the stove I have is 8" pipe. My question is do I need a thimble going through block like that? I've been trying to find one online and they all say only work with dura tech pipe and so on. The pipe I have I got from lowes a while back and I don't see a maker's mark any where. Is there more of a universal thimble? Thanks for any and all answers