The pump is ideal for home solar thermal systems or for circulating pump applications where conventional electricity is not available. Horizontal inlet and outlet with rotating cap, easy installation. Maximum circulating water temperature: approx. 100°C/212°F. Cannot be immersed in hot water over 100°C/212°F. < p>Very long life. Low consumption and low noise. Inlet/Outlet: 1/2" male Suitable for 1/2" male NPT and BSP connections. We tested it.