20″ Big Blue Water Filter Housing – Puritech Double O-Ring

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The 20″ Big Blue Water Filter Housing – Puritech Double O-Ring is a premium large-capacity housing designed for heavy-flow or high-sediment filtration setups. This model supports standard 20″ × 4½″ cartridges, enabling high-volume flows and reduced pressure drop compared to smaller units. Moreover, the double-O-ring seal ensures superior leak protection—making this housing ideal for whole-house systems, borehole water treatment, and pre-RO filtration.

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Key Features

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• Large Cartridge Capacity: Accepts 20″ × 4½″ filter cartridges—giving you flexibility across sediment, carbon block, or specialty media.

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• Double O-Ring Seal: Added seal protection improves reliability and reduces risk of leaks under high-flow or variable pressure conditions.

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• High-Flow Design: With oversized housing and a standard large cartridge, this unit handles higher volumes with fewer vessels.

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• Heavy-Duty Construction: Built for durability in whole-house or commercial environments.

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• Versatile Use: Suitable for household whole-house filtration, borehole systems, and pre-RO protection.

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Technical Specifications

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• Housing Size: 20″ standard length (≈50.8 cm)

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• Cartridge Compatibility: Fits filters up to ~4½″ diameter (≈11 cm)

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• Port Size: Typically 1″ NPT female in high-flow models

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• Max Working Pressure: ~6 bar / ~90 psi (typical)

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• Operating Temperature: ~4 °C to ~38 °C (verify variant)

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• Seal Type: Double O-Ring for extra reliability

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Why Choose This Housing?

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When you’re looking for a robust, high-capacity filter housing for your whole-house water system, the 20″ Big Blue Double O-Ring housing delivers both performance and peace of mind. With its large cartridge size, you get fewer changes and lower maintenance. Additionally, the double O-ring seal enhances durability, especially in systems exposed to lots of pressure variation or heavy sediment loads. All in all, it gives you the flexibility of standard cartridges with the durability required for serious filtration applications.

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Installation & Maintenance Tips

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1. Install the housing vertically with sufficient clearance above the cap for cartridge removal?

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2. Use a sturdy bracket or wall-mount rated for full housing weight when filled.

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3. Lubricate the O-rings lightly with food-grade silicone before inserting the cartridge and re-sealing.

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4. Press the pressure-relief button (if included) before opening for safe cartridge changes.

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5. Replace cartridges at recommended intervals—sediment every 6-12 months, carbon blocks as needed. Inspect the housing body periodically for signs of cracking or UV damage.

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6. After service, check for leaks and confirm flow meets expectations.

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