The black PP thread flange features a one-piece solid design and a female NPT thread connection. Chemtrol® PP fittings are lightweight, easy to install and maintenance-free. Please refer to Chemtrol technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Chemtrol® industrial thermoplastic flow-control systems perform well in harsh environments because they are made with materials that are resistant to abrasion, corrosion, weather, chemicalmore and biological attack. Chemtrol® black polypropylene demonstrates excellent tensile strength, UV stability and versatile chemical resistance properties, making it the material of choice for harsh industrial, outdoor and underground applications. Chemtrol® premium line of plastic fittings is backed by a 1-year limited warranty. Because Chemtrol® is a NIBCO brand the flow-control fittings are unsurpassed in quality, performance and longevity. less