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Re: Oil boilers: elasomer seals or rigid push metal nipples?


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Posted by Joe Brix on September 27, 2005 at 16:25:01:

In Reply to: Oil boilers: elasomer seals or rigid push metal nipples? posted by stan on September 27, 2005 at 14:30:59:

I think it comes down to the boiler design. Elasomer O-rings might be harmed by additives and antifreeze, but if you don't use these products, who cares. Some makers use steel or cast iron push nipples. Some of these have leaked if the sections were improperly cast or not put together correctly. Generally, some will say don't cold start a CI sectional boiler since so much expansion and contraction will cause a leak at an O-ring or push nipple. While most brands use push nipples (Burnham, Peerless, Buderus, etc) I don't feel Weil has any worse a failure rate. I would rather put in a steel welded boiler in a cold start application to avoid the whole issue.



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