For post treatment of rainwater collection systems, the 20″ Full Flow filter housings are the preferred choice for most installations. The large housing and cartridge units offer up to 35 GPM of flow at 60 PSI and the maintenance costs for larger cartridges is much lower than replacing smaller cartridges more frequently. These housings are low cost, durable, easy to install and they accept standard Big Blue size filter cartridges.
The 1″ female NPT inlet and outlet ports allow full flow through any of the Big Blue filter cartridges that will fit in this size of housing. Adaptation to other pipe sizes can be achieved using a threaded bushing or adapter.
Full-Flow/Big Blue Filter Housing for 20″ × 4.5″ OD Big Blue Cartridges.