Polybutylene Piping: Need external heat exchanger?

Old 04-02-24, 02:13 PM
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Polybutylene Piping: Need external heat exchanger?

I have a home built in the 80's with polybutylene piping and baseboard heating. It's not leaking (yet!) and a two story house, so I'd prefer not to rip up my ceiling to replace the piping as the drywall never matches (orange peal). We want to replace the boiler and some folks are telling us that we need an external heat exchanger (as well as stainless steel pumps) to keep the water from the poly piping away from the boiler but other folks are saying with the internal stainless steel heat exchanger that's enough. Thoughts? The quotes for the external heat exchanger are much more as they want to give it it's own pump (which seems crazy for such a small loop), it's own backflow preventer, expansion tank, etc.
Old 04-02-24, 02:25 PM
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Welcome to the forums.

I'm not the pro in this forum.
I'm not following how isolating the poly piping touched water from the boiler will make it last longer.

Your opening post makes it sounds like your entire home is piped with poly.
Then you say it's just one small loop.
Not terribly clear.

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