Black PVC pipe from well to geothermal heat pump carries vibrations from pump motor

[tk2kewl]

I have a geothermal heat pump which is fed well water from a 20 gpm well. the well is connected to an expansion tank and then to the heat pump. The 1-1/2 in black pvc pipe from the well to the expansion tank is attached to my floor joists with simple U-clamps and it vibrates quite a bit. The vibrations can be heard at varying volume levels throughout the house. I've done some googling for some clamps that would deaden the vibrations but have not come up with much other than this: http://www.erico.com/newsDetail.asp?newsid=38. Maybe that is all it will take but I imagine something better exists. Anyone have any ideas?