While some boilers run fine at 3500 ours foam at 3000 and higher.

Posted by Mike Hinz on April 15, 2000 at 13:43:42:

In Reply to: Re: Have you checked to ensure your TDS is within limits? posted by Mike on April 14, 2000 at 12:07:42:

You might check with a chemical company about the limits on your unit.

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