Paramount ECO POOL Ribbed Body System with Black Valve, Light Grey. ECO System is engineered to work specifically with multi-speed pumps at those lower, money-saving pump speeds. Utilizing that sweet spot of efficiency, while effectively cleaning and circulating the entire pool, including walls, floors, steps, benches, and even spas. ECO System’s nozzles pop up systematically to clean, then retract flush with the pool floor, becoming virtually invisible. No vacuum hoses left floating in the pool, no mechanical devices to be removed.