Hayward ECX4077B1 Check Valve Replacement for Select Hayward Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Check valve replacement</li><li>Fits hayward perflex extended-cycle basic and d.e. filter models ec65a， ec75a， ec65， ec75， ec50a， ec30， ec40， ec40ac， ec50ac， i_pfppts， ec50c80x5s， ec40c90</li><li>Also fits hayward asl filter， regenx grid element d.e. filter and star-clear cartridge filter models c85075xes， c125080x5s， rg450， rg700</li><li>Weight 9.3-pound</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41IobMM%2BPmL.jpg" noproxy>