The Rainaid valve. It is a diaphragm valve, made from plastic. It is operated by a float that opens and closes the diaphragm . Float comes with valve. It is used in water storage tanks to control water levels. It is designed to be connected to mains water supply on a rainwater collection tank and will provide backup supply of water in the event of demand exceeding rain supply.

GIR 1 3(b) & 6 HSEN to Heading 8481 and Note (9) of HSEN to Heading 8481