Chaffoteaux et Maury britony Flexiflue diaphragm

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29 Dec 2004
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Changed one of these today due to hole in and was unable to seal the joint between the diaphragm and gas section, tried it 6 times and each time it leaked between the two joining halves. Have done loads of diaphragms with no leaks before used silicon grease and done the bolts up even, correck dia fitted even used old one again still no good.

any ideas :?:
 
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These are about the only diaphragm chambers I've had leak. Used LS-X, but had to let it dry thoroughly before putting the halves together or it just squeezed out. Have fun getting the grease off ;)

Alternative may be to reduce the metal mating surfaces with wet & dry paper on a flat surface - can't remember the shape of the part.
 

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