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Drainback - Unusual Behavior
When my drainback combi-system kicked on today (SDHW portion), I noticed that the sound of the water returning to the drainback tank was unusual at the ball valve and tee right before the tank. Normally, it just sounds like a muffled cascade into the tank, but today it had almost like a crackling or rattling sound at the mentioned valve/tee.
Later in the evening, after the system had shut down and drained back, I looked at the sight tube of the tank and noticed that the water level was down about 1/4 inch from normal. I also noticed some small brownish or reddish particles in the sight tube that I had never noticed before; usually the water in the tube is crystal clear.
Does this sound problematic to anyone? If so, please drop a line.