Herbie Questions

[Madreefer]

Yep I have good quality gate valves and a ATO so my water level in my sump does not fluctuate.
My 2 syphon drains in the overflow are cut approximetly 6" below the 2 emergency drains and I like to keep the water in the overflow 3-4" above those. So no there is no trickle of water in the emergency drains (don't like the sound and don't trust it as i've had the tank overflow when I was not home so I had a really pi$$ed off wife)
Is there a chance it could be a problem with my return pump?
I've also just recently started using a filter sock again and I have noticed that as the sock gets dirty and does'nt allow water to flow out of it as fast it also has an influence on water in the overflow of tank.