Home » Shillafire » Coupling for Fire Water Line (PT x NH) Coupling for Fire Water Line (PT x NH) This is a relay coupling to connect from the firefighting water line to the pipe line or firefighting equipment. The materials are manufactured in bronze or aluminum. Categories: Shillafire, Connector Tags: Connector, Fire Fighting Equipment, Shillafire You may also like… Double Male Coupling (NH Standard) Female to Male Coupling (NH Thread, Swivel) Female to Male Coupling (NH Thread) Hose Coupling (NH Thread) Double Female Coupling (NH Standard) Related products Fire Extinguisher – 305 ABC Fire Extinguisher – 2.5 ABC V/B Fire Hose – Rubber Fire Monitor – Tillers Hydrant Box Type – A2