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Chimney Cowl Adapter Plate for Oversized Chimney Pots

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If you have an oversized, large Chimney Pot then this is the Product and Solution for you. – Our Oversize Adaptor for use with Large Chimney Pots and Flues.

  • Can fit Chimney Pots with an outside diameter of 390mm
  • Can be used in conjunction with Colt Top, High Top and Rotorvent range
  • Stainless Steel Strap Fixing Kit
  • Painted finish which is highly resistant to the corrosive effects of smokeless fuels ? Painted terracotta finish blends in well with roof top colours
  • Flat Top fits Colt Top and Rotorvent range
  • Flanged Top fits Colt Top 2, High Top Birdguard range and Top Lid
Weight 2 kg
Plate Type


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Its sometimes difficult to choose the correct size of Chimney Cowl. We have the perfect solution and can be done from ground level as well. If you can accurately guess the size or width of the chimney pot from the floor you can order the right Cap or Cowl from Chimney Cowl Products. The good news is this is relatively easy once you know the rough size of a house brick and the thickness of the walls of a chimney pot. Using either the naked eye or a set of binoculars get a ‘side on’ view of the chimney pot you wish to cap or fit a chimney cowl, then find a full sized brick nearest to the chosen pot as a reference, normally directly underneath. Now imagine that the brick is placed on top of the chimney pot itself and make a mental note whether it would fit inside, hang over, or sit flush. It may sound silly but once you know that the width of an average UK house brick is 225mm ( 9″ ) for imperial or 215 ( 8 and half ” ) on a modern property, it provides a very accurate impromptu tape measure. The other factor you may need is internal pot size, this can also be guessed quite accurately if you know the average thickness of a chimney pot is about 25mm ( 1″ ) , simply factor this in and you can work out most chimney pot width’s quite accurately. If you have large decorative rolls on top of the pot, make an allowance for this by guessing, using a brick as your guide.
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