In heating systems, pumps are categorized based on their specific functions into circulating pumps and make-up pumps.

Circulating Pumps is to drive hot water through the heating pipes to ensure even heat distribution throughout the system. It is commonly designed for high flow rate, low head (pressure).Common types include vertical pipeline pumps, canned motor pump and split-case pumps.

Make-up Pumps is to maintain system pressure stability by compensating for water loss due to leaks or temperature changes. It is designed for low flow rate, high head (pressure).Mainly consist of vertical multistage pumps or variable frequency pump for  optimal performance.