What is the difference between a Circulation and Boost Pump? Holly June 13, 2018 23:12 Updated Follow A Circulation Pump circulates the water in your spa and can also include a heating element which heats your water. A Boost Pump increases the pressure of water that flows through your jets. Related articles Can I collect my cover from your warehouse? What information do I need when replacing my pump? Comments 0 comments Article is closed for comments.