Originally Posted by Ljfdfireboy
Hope this helps Read the section: Standpipe Air Hole
Sounds like this may be your issue.
Thanks. I had used that article on DIY Dursor pipes when making mine. My hole on the top is already pretty big. 90% of the time it works fine and doesn't gurgle. I have a pretty long run from my overflow to my sump where the pump is located (maybe 15 ft), so that may be why the level various a bit every few minutes. You really think I need to make it bigger?
Also, I think if I could get the PVC
90 to submerge more into the water (right now its about 90% under), it would also work. The variations in the level wouldn't matter as the PVC
pipe would always be under water. Just not sure how to do that either. Any suggestions?