[Chin_Lee]

Niloc
going through the flooring is easy. If you have carpet, cut an X in the carpet, peel it back and drill through the plywood. If you ever pull it out again, replace the hole with the piece you drilled out and reinforce with 2x4 and then just comb the carpet back in place

BUT just going through the photos, it appears you have laminate flooring. If its the more recent stuff, I believe you can unclip parts of it off. Get some extra pieces and store them away for the future. IF and when you dismantle, you would have to remove the pieces with holes drilled through and clip the new ones back. IT IS EASIER SAID THAN DONE but its do-able

I would not put the close loop all the way onto the basement floor - I would put the close loop just under the flooring and maybe between the joists. drill some 2x6's to make a shelf between the joist and put your baracuda in there. It will be a tight squeeze and if its too narrow, mount it as close to the ceiling as possible to minimize head height loss - I assure you the HUM will be greatly reduced especially if you are able to put in thick insulation in the floor joists between the pump and floor. I have lots of humming coming from my basement sump room now with an iwaki70, and mak4, and soon to be started up is the big mean barracuda...... I CANNOT imagine having all that humming in my living room.