Paramount SwingJet Black Adjustable Cleaning Wall Jet. SwingJets keeps your pool clean and healthy by sweeping debris away and circulating warmer water and chemicals from the surface to the pool for to help eliminate evaporation of chemicals and reduce heating costs. Designed to fit into most 1 ½” threaded wall returns, SwingJet delivers an infinitely adjustable 3-step 90 degree cleaning arc with an innovative automatic reversing mechanism.