Welcome to our forum.
What's the spa sitting on? Concrete? A wooden deck?Story time :-)Years ago we did an installation for a VP of a MAJOR software company in SF. One of the most amazing homes I've seen. The tub was built out on a deck some 60' off the ground, supported on steel I beams that ran the entire length of the house (from foundation to foundation). The whole thing was precisely engineered so that when the tub was filled with water the I beams bowed down so the top of the tub was perfectly level with the deck (they bowed over 4"). Anyway, a week after it was complete the guy calls me telling me his neighbors are complaining about the noise. No problem, the equipment was in his basement up against the neighbors wall (home in SF are right up against each other). Figured putting everything on a 1/4" rubber mat would do the trick, so we put in on a 1/2". The darn thing was DEAD silent. A JOB WELL DONE!right........ 3 days later.... neighbors still complaining about the hot tub noise..... OK, well? the plumbing runs through a few walls, lets line the holes through the walls with rubber and suspend the plumbing in the middle of that.... oooooooooooo, that's quieter, not that it made much noise before....... A JOB WELL DONE!Sureeeeeeeee.... neighbors still complaining about the hot tub noise ........ well? I guess we can get a crane out here, lift the tub and put some rubber underneath. That's GOT to solve this once and for all. BIG cranes are so cool. Everybody wants to see what the heck is going on..... even the guys neighbors, who asked what we were doing."Oh, well you see, we're lifting this hot tub and putting rubber matting underneath so the noise doesn't bother you"neighbors - "Hot tub? Bill got a hot tub? When?" Well THAT explains it! We couldn't figure out why he was always out on his deck loudly "propositioning" all these women"