presents two in-line filtration systems. ® ®HHBB10B - 10" Big Blue and HHBB20B - 20" Big Blue in-line filtration systems. ®Both systems consist of Big Blue filter housings to meet all customer large-capacity filtration needs. The systems are dedicated for high flow, cold water on commercial and industrial applications. The housings are compatible with a broad range of 4 1/2” x 20" (or 4 1/2" x 9 7/8") type cartridges widely available on the market. Filter housings consist of housing sump and filter head with 1" brass inlet/outlet inserts. Heads are equipped with a pressure relief valve (providing ability to release air bubbles collected during cartridge replacement procedure) and two pressure gauges (providing pressure drop monitoring). This configuration enables the measurement of the pressure drop at the inlet and outlet connections. In addition, brass inlet/outlet inserts enable damage-free installation of pressure relief valve and pressure gauges.