<http://schema.org/description>
"&lt;p&gt;This coolant filter back flushes the trapped particles away from the permanent filtering element to restore its effectiveness. The operating principle is similar to a backyard swimming pool.&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/articles/coolant-filter-requires-no-replaceable-elements>