anti freeze in a HWB sysrem


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Old 10-28-07, 12:31 PM
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anti freeze in a HWB sysrem

I have a HWB system , 2 zone. Last year the system lost a zone valve and shutdown, sisnce it is a summer home I did not check it for a week and the baseboard pipe froze and burst. I would like to use antifreeze in the boiler and do not know which one to use? Can I use diluted pink or green auto anti?
 
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Old 10-28-07, 12:52 PM
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Don't use automotive antifreeze. Use a glycol specifically for hydronic heating usage.
 
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Old 10-28-07, 06:12 PM
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Anti-Freeze

Be sure to get the stuff made specificly for hot water heating systems. Once it is installed & the system runs for 15minutes or so, to get the water & anti-freeze well mixed, be sure to check the pH. There are compounds available to adjust the pH if needed. Failure to correct the pH can result in a corrosive mixture which can & will eat the copper.
 
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Old 10-28-07, 07:38 PM
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What should the PH be for a copper tube system?
 
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Old 10-28-07, 08:07 PM
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pH

Here's a link to an article about anti-freeze & pH.
http://www.fueloilnews.com/uploads/f...7_feature5.asp

Personally, I think anything over 9.0 is too high. Just my opinion.
 
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Old 10-28-07, 09:35 PM
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Is there any way you can reduce your risk of another freeze-up without antifreeze? It doesn't help your system any and you need to keep a much closer eye on the water quality.
 
 

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