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A few years ago I built a DIY durso and weir for my undrilled tank. When I reassembled it and started it up after its most recent cleaning soak, it started the "toilet flushing" sound I've read about on the forums but hadn't experienced myself until now. The water levels are holding steady. I've read that sometimes the flushing sound is caused by the return pump not being in synch with the volume of water going through the overflow/durso, but I assume if that were the cause, the water levels would also be fluctuating. Is my assumption incorrect?
The durso is glued PVC that runs up the inside of the tank, over the lip, and back down the outside of the tank. When it reaches the tank stand, it transitions to a clear hose that slopes it into the sump. The hose ends a few inches under the water line in the sump. The return pump is a clear hose leading from the sump, transitioning to glued PVC to run up the height of the tank and over the edge into the DT. I control the flow with a ball valve on the PVC portion of the return pump plumbing. I originally thought I might have accidentally bumped the ball valve slightly during cleaning, but again, I assume that would have resulted in unstable water levels, vice the (noisy) stability I'm currently experiencing. Welcome any/all advice to banish the flushing noise.
The durso is glued PVC that runs up the inside of the tank, over the lip, and back down the outside of the tank. When it reaches the tank stand, it transitions to a clear hose that slopes it into the sump. The hose ends a few inches under the water line in the sump. The return pump is a clear hose leading from the sump, transitioning to glued PVC to run up the height of the tank and over the edge into the DT. I control the flow with a ball valve on the PVC portion of the return pump plumbing. I originally thought I might have accidentally bumped the ball valve slightly during cleaning, but again, I assume that would have resulted in unstable water levels, vice the (noisy) stability I'm currently experiencing. Welcome any/all advice to banish the flushing noise.