What Does IPS Stand For in Plumbing?

Curious about labeling on valves and fittings—what does ips stand for in plumbing? Here’s a clear, inspector-friendly explanation with practical checks you can use on site. IPS stands for Iron Pipe Size. In plumbing, IPS refers to the legacy nominal sizing system used for steel and iron pipe, and it’s commonly associated with NPT (tapered) […]


