You need a Durso standpipe to release some air from the line. Also, I often vent some air in the sump area too. Look at the last elbow. Can you fit a "T" there with one section pointing upward? If so, you can cap that section off and put a small air hole in it so any remaining air can escape.
Sump, "gurgling"
- Thread starter Otto_VonBacon
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