REHAU RAUPEX 02

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Weekend Handyman

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Does anyone have any idea why REHAU advises not to use F1807 crimp rings fittings in Hydronic Heating systems?


I find is strange, given they do allow them for their non oxygen barrier pipe:


They must have found something when they did their testing. I emailed them to ask ... will let you what they say, if they get back to me.
 

Fitter30

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Looking at the everloc+ fittings they have 4 sealing edges and are longer to spread the crimping out. Guess their worried about a abrupt temp change from a cold boiler to hot with just a compression ring. Where out in the system temp rise would be gradual.
 
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