Pentair U9-362 Union O-Ring Replacement for select Sta-Rite Pool and Spa Filters<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Union O-ring replacement</li><li>Fits Sta-Rite System 3 Modular Media pool and spa cartridge filters model S7M120， S7M400， S8M150， S8M500</li><li>Also compatible with System 3 SD Series D.E. pool and spa filters model S7D75， S8D110</li><li>Fits with Sta-Rite IntelliPro variable speed pool and spa in ground pump</li><li>This O-ring is designed to use with Sta-Rite FullFloXF Backwash pool and spa valve and also use with Sta-Rite Bronze Pool and Spa Valves</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31kfKVTELEL.jpg" noproxy>