horizontal hot-water circulation pump advantage 1no noise,no leakage 2,s.s shaft,seal,shield set 3,big power Hrizontal hot-water circulation pumpa) Specification ModelMaterialsSpeedCurrent ... loop system.It also can be used to supply water and add pressure for mansions of city,villa of ... equipment,to supply water in cycle for cooling-air-condition,boiler and solar energy,supply hot water and keep warm ...