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No-hub cast iron pipe is the same as hubless cast iron pipe.

Both are terms used to identify a type of grey iron pipe that is manufactured for use in DWV and storm drainage applications.

The terms "no-hub" or "hubless" refers to the pipes end. In contrast to "service weight" pipe, no - hub has no hub on the end and is joined using a no-hub coupling comprised of a 316 stainless steel shield with worm gears and a neoprene gasket.

No hub pipe is manufactured to meet ASTM A 888 and CISPI (Cast Iron Soil Pipe Institute) 301 standards. To verify compliance you should use no - hub pipe and fittings bearing the NSF-upc (National Sanitation Foundation) mark.

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16y ago

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