The black PP threaded union features female NPT thread connections. This fitting is supplied with a FKM fluorocarbon seals which is suited to most applications involving mineral acids, salt solutions, chlorinated hydrocarbons and petroleum oils. It is also available with EPDM ethylene propylene which has good abrasion and tear resistance, plus excellent chemical resistance, but not recommended for applications involving petroleum oils or most strong acids. Please refer to Chemtrol technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Chemtro