US Spa uses pumps made from the industries largest and most reliable spa pump manufacturer, Aqua-Flo. In our larger models, US Spa uses two 3.5 HP single speed pumps that can pump 170 gallons per minute each.  Our larger hot tubs have half the jets attached to pump 1 and the other half to pump 2.  Many spa manufacturers use a diverter valve that allows them to use a single pump and close off a section of jets in order to provide strong jet action to the other section of jets.  We have spent the money to put in two strong pumps eliminating the need for  diverter valves and to assure our customers thorough hydrotherapy.

In our larger models, we use a 1/15 HP pump for 24 hour circulation and filtering of the water. These pump 50 gallons per minute. Thus a 500 gallon hot tub will have the water run through the filter every ten minutes or six times an hour. Some spa manufacturers use 2 speed pumps: a low speed for filtration and a high speed for jet circulation. The chance for failure increases by a large % because the pump is gearing up and then slowing down creating extra stress on the internals. We have included 24 hour circulation as a standard feature to insure you the cleanest water to enjoy in your spa.