Do you have bubbling and/ or splashing noises from the water entering your sump, have you tried almost everything. Here is something that you may have never heard of. It's called a Reverse Durso. It was introduced to me from a Mr. Todd_Sails (username). Since my introduction to this DIY silencer my sump has been free of bubbling or splashing noises. The Reverse Durso is exactly what the name implies. It is a Durso standpipe that is used upside down and installed directly above the sump to quiet the bubbling and splashing noise caused by water entering the sump. The concept is to allow the air to escape prior to the water entering the sump allowing for a smooth and quiet exit. I did my research and looked at pictures and this is how I built mine. It is very simple to construct. It is preferable to oversize the piping for example. If you have 1" plumbing then the piping for the Reverse Durso should be 1 1/4"+. My plumbing is 1" and my first Reverse Durso was also made with 1" because it is what I had lying around. Even with the Reverse Durso the same size plumbing from the overflow it was still fairly quiet. Since I built my 2 new Durso out of 1 1/4" piping it is much more quiet and virtually silent. Everything I needed to construct 2- 1 1/4" Reverse Dursos cost me under $10.00 at Home Depot. What you need: (1 Reverse Durso) 1- PVC T 1- PVC 90 elbow (street elbow if desired) 12"+ of PVC pipe 1- PVC cap 10"+/- airline tubing Step 1- drill a hole in the PVC cap to allow the airline tubing to slide in, snugly. Step 2-Cut 2 pieces of PVC pipe long enough to join 2 PVC fitting together. (If using street elbows please skip step 2) Step 3-glue PVC elbow to pipe that was cut in step 2, and that to PVC T as shown in picture. (If using street elbow glue elbow into T) Step 4- slip cap with airline tubing onto the 12" piece of PVC pipe. (This piece I did not glue because if I need to add a longer piece of pipe to allow more air I can always swap it out.) Step 5- slip PVC pipe with cap into the top of the T as shown in picture in step 3. Step 6- glue reducer fitting (if using oversize diameter piping other than original plumbing size) into the top of the PVC elbow. Step 7- (the body of the Reverse Durso is complete) slip the Reverse Durso onto plumbing above the sump Step 8- (depending on the height to the waterline in sump) cut to fit PVC pipe to be inserted to the bottom of the T so the pipe will go just below the waterline of the sump. This should complete your build and installation of your Reverse Durso overflow drain silencer. You can now enjoy your setup without the loud splashing or bubbling of water into your sump from your overflow.