Siamp Float Valve Side Entry Brass Tail 1/2" is fitted to a toilet cistern or storage tank to measure the amount of water used for a flush. It provides a fast refill of the cistern with a complete shut off after every flush. The side entry valve ensures minimal water hammer for a quieter refill. It has a built-in backflow prevention valve to prevent any contamination of fresh water. The filter can be easily reached without needing to disconnect from the water supply. Has a heavy-duty ½” brass connection.