Get a guided demo of the PN25 nickel-plated brass ball valve, 1/2"–4" female x female. Watch a full teardown of the brass body and chrome-plated ball, a quarter-turn flow test, and installation tips for water, oil, and gas lines. See how full-port design cuts pressure drop, compare it with PPR brass-ball valves, and learn where nickel plating resists corrosion in drinking water, heating, and irrigation systems.