DEL Ozone 2” Universal Injector Manifold 9 0210 11 Hayward SwimClear Unions Hayward's Simplex Basket Strainers protect 475054Z Hayward's Simplex Basket Strainers protect the line from dirt & debris and are used when the line can be shut down for basket changeout or cleaning allows the heat pump to operate at even lower temperatures The 2" Injector Manifold Installation Kit is plumbed into the pool line allowing Ozone to inject through a venturi while the pool circulation system is operating vinyl lined pools or if any return jet is near a window as the Ozone system will create a bubbling noise that may become disturbing in the evening hours