Inquiry (采购产品): plastic pipe welder We have 1.5 miles of gravity pipe to install and no cement I have used works on the couplings. It was suggested that I weld the joints. The pipe is 3" id and about 3.75 od. Not sure what kind of plastic it is . I got it from a saw mill here that uses it as a core for lumber wrap. Send pricing for what I need also used **** Hidden Message ***** ED Wylde 83541 Company: willola farms E-mail: willola3@imbris.net **** Hidden Message ***** willola3@imbris.net