Description
Overview:
The 1.1/2" Counterweight Style Exhaust Rain Cap is a clamp-on cover for vertical exhaust stacks on plant, agricultural, and garden machinery. It protects the exhaust outlet from rain, washdown water, and debris by using a counterweighted lid that opens with exhaust flow and closes when the engine stops. Built from robust steel with a trivalent anti-corrosion finish in a silver-grey tone, it is designed for outdoor use and long service life. Sized for 1.1/2 inch outlets (approximately 38 mm outside diameter), it is commonly fitted to tractors, site dumpers, excavators, generators, and compressors. Easy to fit with basic tools, it helps prevent water ingress that can lead to corrosion and performance issues. Manufacturer Part Number: 311 112.
Key Features:
- Sized for 1.1/2 in exhaust outlets (approximately 38 mm OD).
- Counterweight lid opens under exhaust pressure and closes to block rain when the engine stops.
- Steel construction with a trivalent anti-corrosion finish for durability in harsh weather.
- Simple clamp-on installation with a band and bolt; no welding required.
- Helps prevent water ingress that can cause corrosion, fouling, and starting issues.
- Low resistance to exhaust flow for reliable engine performance.
- Low maintenance design; hinge can be checked and lightly lubricated during routine servicing.
- Suitable for plant stored outdoors or working in wet, muddy, or washdown environments.
Typical Applications:
Protecting vertical exhaust stacks on construction plant, agricultural tractors, generators, welders, compressors, pumps, ride-on mowers, chippers, and other machinery kept or operated outdoors. Ideal for equipment that faces rain, jet washing, or site splashback, helping maintain a dry exhaust path and reducing the risk of internal corrosion.
Also known as:
Exhaust flapper, flapper valve, weather cap, stack cap, exhaust stack cover, muffler cover, exhaust outlet cover, exhaust protector, anti-rain exhaust lid.
Product Specifications
| L&S Part No. | 311 112 |
|---|---|
| Unit of Sale | 1 |
| Size | 1 1/2 inch (37mm) |
| Key Features | - Fits 1.1/2 inch (38 mm OD) exhaust outlets - Counterweight lid opens with exhaust, closes when engine stops - Steel with trivalent anti-corrosion finish for durability - Clamp-on installation; no welding needed - Prevents water ingress, reducing corrosion and starting issues |
Reviews 1
Ask a Question
Compatibility
Customers also bought
-
![]()
PCL Twin Clipon Tyre Inflator Open Ended£42.35 £35.29 -
![]()
Sprocket Cover Nut M8 for Husqvarna Chainsaws£0.72 £0.60
