Re: Sewer Cleanout Test Plug
Posted by Bartman on February 06, 2004 at 02:43:45:
In response to Re: Sewer Cleanout Test Plug
Ken - Even if the cleanout is cast iron, IPS threads = NPT threads. Pipe size, thread size and pitch are the same on iron or galvanized. There is a mfrs. standard for 2-1/2" pipe, but it is not commonly stocked or used in residential plumbing. I just want to make sure, when you say 2" you're talking the pipe size and not the actual measured dimension across the plug. Is there any chance the pipe size of your cleanout is really 1-1/4", and your trying to plug it with a 1-1/2" plug? Cuz 1-1/2" pipe really has an OD of almost 2", and its a common mistake.

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