Pentair 27001-0130S Spring Check Valve Replacement Sta-Rite Pool/Spa D.E. and Cartridge Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Spring check valve replacement</li><li>Fits Pentair Sta-Rite PLM and System 2 modular media pool and spa cartridge filter models PLM100， PLM125， PLM150， PLM175， PLM200， PLM300</li><li>Also fits Pentair Sta-Rite PLD and System 2 modular pool and spa D.E. filter models PLD50-DE， PLD70-DE</li><li>Measures 1-inch length by 1-inch height by 1-inch width</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41bAj1YpfvL.jpg" noproxy>