UWF Disconnect Kit: Universal D29 to 1/8" Wall Adapter Quick disconnect compatible with Polaris 180, 280, 380, 480 Pro, 3900 Sport pool cleaners. 9-100-9002 Pressure regulating valve: compatible with Polaris models 480 Pro, 3900 Sport , Vac-Sweep 380, Vac-Sweep 280, 280 TankTrax swimming pool cleaners. High quality; These parts are made from durable, wear-resistant ABS plastic. wear and well tested by the manufacturer which guarantees high durability. and a long . Large function: 9-100-9002 Pressure relief valve: when the pressure reaches inside the line exceeds the spring tension, the spring opens and relieves the excess pressure. Screwing in all the way can provide the required amount. maximum pressure and accelerate; D29 UWF Quick Disconnect: This is the main body of the wall adjuster that makes a rotation lock on the pool wall.