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Originally Posted by Nemo
I would do 2 things.
1. put flex between the sump and the pumps, you can put the valves on the other end of the bulk heads inside the sump to give you more room for the flex.
2. If you have any other holes in your sump move one of the pump inlets to another side of the sump.
3. add foam to the under side of the sump
JMO
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1. I just did this on the skimmer pump and it had no effect on the noise at all. I haven't done the return pump because it's a lot of work and I don't think it'll do anything. I only have about 7.5" of room for hose. (without the valve)
2. This isn't an option due to my setup and location, it's tight.
3. The entire bottom of my stand is lined with foam, everything is sitting on foam.
I'm going to try out the rubber coupler idea and hope I can get somewhere with that. It's very annoying, in many ways...