A strange one - polybutelene piping used in radiant heating system
I've been having some issues with my radiant heating system lately, and I had a guy take a look at the issue (one of the pumps was grinding away). Well, when he took a look at the system, his first instinct was 'Your system uses polybutelene, so a band-aid would be to replace the pumps, but the real solution is to teardown and replace the entire system, get some baseboard heating in, etc...'
The pump replacements run in the neighbourhood of $700-$800, and he stated that they could last anywhere from a couple years to a couple hours, whereas the system teardown is in the area of $15-16,000, so there is obviously a large gulf of difference here.
Now, I've taken a look at some information on polybutlene online, and I've found a few things -
For the most part, the big polybutelene issues ran in system installed between the late 70's, and late 80's. Our system was built, with the house, in ~1994.
Additionally, the majority of issues with this piping were recorded in the United States, not in Canada. Again, we live in Canada with this system, in British Columbia.
I know that a couple years ago (before we bought), the system was flushed, and a pump replaced, with some rust cleaned out of the boiler. This is apparently the main issue, that the polybutelene piping oxygenates the water, thus allowing rust into the system at different levels.
My question is this - is there a solution that could be used, like conditioning the lines, etc... that could help to alleviate this issue? Basically, there is a pump grinding away, and the pro stated that it's because it's backed up with rust (using his experience and viewing a video of the occurence), and I'm just a little leary of this grandiose solution to this issue, if you can understand.
Thanks so much in advance!