The pump is ideal for home solar thermal systems or for circulation pump application where conventional power is not available. Horizontal inlet and outlet with rotating cap, easy installation. Maximum circulating water temperature: approximately 100°C/212°F. Cannot be immersed in hot water over 100°C/212°F. < p>Very long life. Low consumption and low noise. Input / Output: 1/2 “plug Suitable for 1/2” NPT and BSP connectors. We tested it.