Or may be a hardness test? Mine doesn't appear to have it. Information Warning: This is a relatively older threadThis discussion is older than 360 days. Some information contained in it may no longer be current.
Last edited by Brit plumber; 07-29-2016 at 10:17 AM.
Vincent
Originally Posted by Brit plumber Or may be a hardness test? Mine doesn't appear to have it. They are not always in the same location. It might be on the other side.
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