Abstract: A rotatable unitary ball valve is provided, comprising, in combination:(1) a unitary valve housing of plastic material defining a ball valve chamber, intercommunicating first and second fluid ports and first and second fluid passages, and a threaded end connector socket in one passage;(2) an externally threaded end connector integral with the valve housing, permanently fixed in the end connector socket, and adapted for attachment to a fluid line; and the other fluid passage being adapted for attachment to a fluid line;(3) a ball valve having a through fluid passage intercommunicating the first and second fluid passages of the valve housing only in the open position of the valve, and disposed in the valve chamber for rotation between open and closed positions; closing off intercommunication between the first and second fluid passages via the ball valve chamber and the ball valve through fluid passage in the closed position, and making such intercommunication in the open position;(4) at least one sealing means

Abstract: An underwater light is provided for use particularly with swimming pools, having fail-safe twin grounding connectors to prevent electrical grounding through the water in event of failure of one grounding connection.