Check the listing for details. for Zodiac Diffuser Kit R0445400. Condition: New. Listed at 52.93 USD. Fitment:A good diffuser together with O-rings helps in pulling the water flow in tight for the impeller and stops air getting in to the line. However, if a diffuser is 1)cracked or 2)melted after running dry for a long time, your pump probably will not work well. And that’s when this kit needed Features: 1) Will fit for Zodiac Jandy ePump, Stealth, PlusHP, WaterFall, MaxHP series pumps models JEP, SHPF/SHPM, PHPF/PHPM, SWF, MHPM. (Available in 0.50 to 3.0-Horsepower) 2) Check you pump to see whether it 1) puts air bubbles into the lines; 2) has low pressure issue; 3) runs with excessive noise. (For reference only, plz refer it to your actual use) 3) The R0445400 Diffuser is used to connect the pool pumps and filters. Its primary function is to help evenly distribute water flow and reduce turbulence as water returns to the pool, which can improve filtration efficiency and enhance the overall performance of the pool's circulation system. By ensuring that the water is diffused properly, it can also help prevent damage to the pump and other components and improve water clarity Package included:includes 1 Diffuser, 2 Screws, 2 Washers, 2 O-rings & 1 R0445200 Backplate O-ring