I have a 4" cast iron waste pipe coming into the basement of a property. It appears to be coated with a woven mesh material which has then been painted. I wondered if anybody had any idea as to what the material could be. I've also come across similar on a 1/2" copper water pipe . Any help gratefully received as looking to bond the pipe subject to further investigation.
It would be unusual to put cast-iron in the soil - usually they transitioned to salt-glazed earthenware as soon as it entered the ground (which is a lot than chunkier cast iron of the same nominal size as it has much thicker walls). If it was originally underground and looks a lot thicker my money would be on it being (non-conductive) earthenware rather than cast iron.
It would be unusual to put cast-iron in the soil - usually they transitioned to salt-glazed earthenware as soon as it entered the ground (which is a lot than chunkier cast iron of the same nominal size as it has much thicker walls). If it was originally underground and looks a lot thicker my money would be on it being (non-conductive) earthenware rather than cast iron.
