3M Aqua-pure 6981131C Filter Sump， Plastic<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits AP11s and AP101S</li><li>Replacing the sump on your filter system is recommended every 5-7 years</li><li>Replacement Parts</li><li>10" Opaque Housing</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31oxgSUXahL.jpg" noproxy>