Paramount PV3 004627506002 Nozzle with Twist Lock Cap, Grey. Built right into the pool shell PV3 is engineered to clean your entire pool, including floors, steps, benches, even spas. When not operating, PV3 disappears back into the pool floor, making it virtually invisible. There are no vacuum hoses left floating in the pool. All that’s left is a sparkling clean pool that’s ready to enjoy. PV3 is custom-designed for your unique pool shape. It is so effective that it will clean 99% of your entire pool, guaranteed, as well as significantly reduce heating and chemical costs for the life of your pool.