The WW Waterwarmer heat exchanger/cartridge filter allows you to heat or cool as you filter, with no need for a separate heat exchanger. Its compact design and dual-purpose features save space, piping and installation time while improving lubrication and cutting performance. Features include a patented up-flow design, an electropolished 304 stainless steel housing and a fail-safe lid closure rated for 150 psi. It comes in three sizes for greater media surface area and thermal output transmittance, and is equipped with Harmsco Premium 801-20-HT Polyester-Plus filter cartridges. Application include viscous fluid filtration, chilling coolants for sawing/machining, chilled water recirulation/loops and more.