2 inch Mild Steel Rain Cap

The 2 inch mild steel exhaust rain cap is a gravity-operated weather cap designed to fit a 2 inch (51mm) vertical exhaust stack outlet. Rain caps prevent rainwater, debris and insects from entering the exhaust system when the engine is not running, protecting the silencer and pipework from corrosion and blockage caused by water ingress. The hinged cap opens automatically under exhaust gas pressure when the engine starts and closes by gravity when the engine stops, providing reliable protection without any manual operation or additional components. This mild steel version is suited to sheltered and indoor applications — including warehouse forklift exhaust systems, generator installations in buildings, and compact plant machinery operating in covered environments — where corrosion exposure is limited.