4 inch Mild Steel Rain Cap

The 4 inch mild steel exhaust rain cap provides weather protection for 4 inch (102mm) bore vertical exhaust stacks, one of the most common bore sizes across heavy industrial plant, large generator sets and construction equipment. The gravity-operated hinged cap closes under its own weight when the engine is off, preventing rainwater, debris and insects from entering the exhaust system, and opens automatically under exhaust gas pressure when the engine runs. The mild steel construction is appropriate for sheltered and indoor applications including large generator rooms, covered plant bays and industrial buildings.