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Lobster Back Cowl

Estimated delivery time 7-10 working days

Availability: In stock

The Lobster Back Cowl makes use of a vane and bearing system to allow itself to catch the wind and rotate to ensure that the opening is always directed away from the prevailing wind preventing unwanted downdraught.

Made out of stainless steel and available in two universal sizes to fit all standard chimney pots this rotating cowl offers a no nonsense and effective solution against highly exposed areas with strong prevailing winds. 

Stainless steel strap included.


  • 150 (115 - 180mm)
  • 200 (180 - 230mm) +£22.25


  • Stainless Steel (Unpainted)
  • Terracotta +£10
  • Black +£10
  • Buff +£10

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These are made here in our own factory in the UK.

What is it for?

If you have a problem with a steady blow back of smoke – this may be caused by unfavourable site conditions. As the wind strikes buildings and trees, areas of air pressure and suction are set up. The pressure may be greater than the upward pressure of the smoke rising up the flue. This pressure variation effect can be a problem where the chimney outlet is below the roof line or lower than surrounding buildings and trees.

The Lobster Back Cowl is ideal for solving these problems, as it swivels freely – the vane at the top directs the open vent away from the prevailing wind and should produce suction at the correct point to allow efficient exhaust of fumes and smoke.  Due to this mechanism, it also acts as a great solution for protection against driven rain.

Maximum temperature of 250°C.

What sizes & options are available?

The Lobster Back Cowl is suitable for fitting to a round chimney pot or flue.

It is available in two sizes:

1. The Model 180 for internal diameters between 115mm to 180mm (4.5” to 7”).

2. The Model 235 for internal diameters between 180mm to 235mm (7” to 9.5”).

The Lobster Back Cowl is made from stainless steel with a cast aluminium base. It is available in natural (unpainted), or powder coated terracotta, buff or black.

How do I fit one?

The Lobster Back Cowl is fitted using the hook bolts and external leg and stainless steel strap provided.

It is suitable for fitting to a round chimney pot. However, special adaptors can be purchased in addition, to suit a variety of applications such as large round, square and even rectangular outlets. An adaptor plate is required for metal or plastic flues and ducts. Brewer also recommends the addition of an adaptor plate for exposed areas with high wind.

How do I order one?

Either order online or call us and one of the sales team will be able to take your order. Normal delivery time is 7 working days from order.

If an adaptor plate is needed, you must call us in order to place your order. 

Additionally, if you require a Lobster Back Cowl for a gas sytem then please call us to place your order as it will be treated as a bespoke item. 


Important Note

We advise that your chimney or flue is inspected and swept by a qualified chimney sweep before fitting a chimney cowl or terminal. We also recommend using a professional to specify the correct product for your fuel, chimney system, size and needs. If you require any help or advice please call us on 01243 539639.

We cannot take responsibility for any terminal or cowl that has not been specified or fitted by a professional and is not suitable for your application.