New Tank!

it does not look like you have a hole drilled in the top of the Durso. drill a hole and then feed some tubing down it until you hit the "sweet spot". that should stop the gurgling and burping.

fwiw, i switched from vinyl tubing to PVC on my return which is almost identical to yours. i have since switched back to vinyl b/c the noise is significantly less.

try this link:
www.dursostandpipes.com

also, do a search for durso and you should get numerous threads covering your exact issue.

hope that helps.
 
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