Pentair Product Documents
The Pentair (4.5 × 20) Filter Housing is engineered for high-capacity water filtration applications requiring extended cartridge life and strong flow rates. Its large-diameter design accommodates 4.5″ × 20″ Big Blue-style cartridges, making it ideal for whole-house, commercial, and light industrial systems.
Featuring a heavy-duty black sump and reinforced grey cap, this housing provides long-term durability and excellent chemical resistance. The top-seated Buna-N O-ring ensures a secure, leak-free seal, while the 1″ FNPT inlet and outlet connections support higher flow applications with minimal pressure drop.
Features:
- Large 4.5″ × 20″ Big Blue-style housing
- Heavy-duty black sump with reinforced grey cap
- Top-seated Buna-N O-ring for reliable sealing
- 1″ FNPT inlet and outlet connections
- Compatible with extended-life filter cartridges
- Durable polypropylene construction
- Ideal for residential, commercial, and high-flow filtration
Specifications
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Component Type: Single-Cartridge Filter Housing
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Diameter: 4.5 in
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Length: 20 in
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Housing Material: Polypropylene (Black Sump / Grey Cap)
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O-Ring Material: Buna-N
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Maximum Operating Pressure: 90–100 psi (Typical)
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Operating Temperature Range: 40 °F to 125 °F
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Color: Black / Grey
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Application: High-Capacity Water Filtration
