Can anyone identify the cast iron drain piping in the photos below? I'm trying to determine if they are "Service Grade", or "Extra Heavy" grade. I need to replace the lead pipe, and as I understand it, XH vs SVC will make a big difference in my course of action. I cannot see any markings on the pipe at any point which indicate which type it is. The "T" junction pictured has "3859" on the side. Thank you for looking.
Can't tell by looking at it unless you can see "SV" stamped on the fitting or pipe. The numbers you referenced are probably the fitting's catalog #. You need to measure the OD to be sure. However, since this is in a house I'll bet its SV No reason to have used for extra heavy
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