 Water for treatment and use is drawn from the Staines and King George VI Reservoirs and flows along the Staines Reservoirs Aqueduct in an east-south-east direction to Ashford, then around the north side of Queen Mary Reservoir, water discharged from the reservoir enters the aqueduct at this point.The aqueduct continues across Ashford Common with a connection to Ashford Common water treatment works and then across Sunbury Common.From Sunbury Common the aqueduct changes direction to the north-east, it curves around the north side of Kempton Park race course with connections to Sunbury and Kempton Park water treatment works, and flows in a south-east direction into the Red House distribution reservoir (51°25'11.6"N 0°23'20.4"W).