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closet flange, copper pipe

Use a turbo tip that will do 3-4" copper. If you have a presta-lite outfit, you can buy an adapter that screws into the presta lite torch handle. Go to your plumbing supply and ask them for a "Goss" turbo tip adapter. You will also need to buy the tip, and they are expensive. This tip in question can cost around $40.00 to 50.00. Your regular propane handheld tank is not going to generate enough temperature for this type of job. The turbo tips can generate temps of 2500 degrees F, so make sure you wear thick heavy gloves, and most important safety glasses.