PureT - C907 Series - 10" Double O-Ring Big Blue Filter Housing Black Cap / Clear Sump with PRPureT C907 Series 10" Double O Ring Big Blue Filter Housing Black Cap Clear Sump with PR Heavy duty commercial grade housing engineered for residential and light industrial filtration systems using standard 10" x 4. 5" cartridges 90 PSI Max 1" NPT Ports Double O Ring Seal Clear Sump WHY IT WORKS Built for durability and ease of maintenance Double O Ring Seal Dual O ring design creates a leak resistant seal even under pressure fluctuations, reducing