If you're working with PVC piping systems, this Spears 852 series flange fitting is exactly what you need for connecting pipes or valves properly. This isn't your basic hardware store fitting - we're talking Schedule 80 thick-wall PVC that can handle serious pressure (up to 150 PSI at 73°F) and temperatures up to 140°F. The female NPT threads create a much tighter seal than straight threads, which means fewer leaks and headaches down the road. Made from gray PVC that's naturally corrosion-resistant and way lighter than metal fittings, it's perfect for chemical processing, industrial applications, water distribution systems, and wastewater treatment. It's even NSF certified for potable water, so you know it's safe for drinking water systems. Meets all the important ASTM standards for quality, and that Class 150 bolt pattern means it'll work with other standard components. Whether you're a professional plumber or a serious DIYer working on chemical drainage, chilled water lines, or industrial plating systems, this flange fitting will make your life easier and your installations more reliable.