The Everpure EV311238 20" replacement bowl for E Series prefilters is designed to enclose and protect the filter cartridge within compatible water filtration systems. It works by attaching to the filter head to form a sealed chamber, directing incoming water through the prefilter media to capture sediment and debris before it reaches downstream equipment. This enclosed design helps ma... https://partsfe.ca/ev311238-everpure-replacement-bowl-20