I have a flo-master 06620390-2 pump that failed.

You are generally better off replacing the pump with the same model. Hot tubs are noisy unless you have a really good insulation job. It is unlikely changing the pump will make it any different as far as noise goes. The flip side is that the manufacturer sized the pump to match the hydraulic load present within your specific tub and to provide the necessary flow rate to keep the water clean. It can lead to problems if you put in the wrong replacement unit.

If you would like a quote on the replacement motor and/or pump end, contact us thru www.arrowpools.net.