namelus, have stand by and will be getting an extension for the muffler to keep it quiet but what’s a sound box. Been reading I could put the end of muffler extension in a 5 gal. bucket filled with water buried partway in the ground. Haven’t tried it yet but what are your thoughts or anyone’s thoughts on keeping a stand by QUIET. I’m also trying to figure out how to silence the sump coming out of the house. One idea I have is to build a sound deadening box to go around the pipe outside. IF you hear it ergo, they have power even if everything else is quiet or deadened. I have a battery back up but it will eventually die, just don’t want to tip off anyone that by golly her 12 hour back up is still running the sump after a few days.
