{"product_id":"20-big-blue-water-filter-housing-puritech-double-o-ring","title":"20″ Big Blue Water Filter Housing – Puritech Double O Ring","description":"\u003ch1\u003e20″ Big Blue Water Filter Housing – Puritech Double O-Ring\u003c\/h1\u003e \u003cp data-start=\"551\" data-end=\"1044\"\u003eThe 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.\u003c\/p\u003e \u003ch3 data-start=\"1051\" data-end=\"1068\"\u003eKey Features\u003c\/h3\u003e \u003cul\u003e \u003cli data-start=\"1071\" data-end=\"1249\"\u003e\n\u003cstrong data-start=\"1071\" data-end=\"1100\"\u003eLarge Cartridge Capacity:\u003c\/strong\u003e Accepts 20″ × 4½″ filter cartridges—giving you flexibility across sediment, carbon block, or specialty media.\u003c\/li\u003e \u003cli data-start=\"1252\" data-end=\"1433\"\u003e\n\u003cstrong data-start=\"1252\" data-end=\"1275\"\u003eDouble O-Ring Seal:\u003c\/strong\u003e Added seal protection improves reliability and reduces risk of leaks under high-flow or variable pressure conditions.\u003c\/li\u003e \u003cli data-start=\"1436\" data-end=\"1603\"\u003e\n\u003cstrong data-start=\"1436\" data-end=\"1457\"\u003eHigh-Flow Design:\u003c\/strong\u003e With oversized housing and a standard large cartridge, this unit handles higher volumes with fewer vessels.\u003c\/li\u003e \u003cli data-start=\"1606\" data-end=\"1700\"\u003e\n\u003cstrong data-start=\"1606\" data-end=\"1634\"\u003eHeavy-Duty Construction:\u003c\/strong\u003e Built for durability in whole-house or commercial environments.\u003c\/li\u003e \u003cli data-start=\"1703\" data-end=\"1809\"\u003e\n\u003cstrong data-start=\"1703\" data-end=\"1721\"\u003eVersatile Use:\u003c\/strong\u003e Suitable for household whole-house filtration, borehole systems, and pre-RO protection.\u003c\/li\u003e \u003c\/ul\u003e \u003ch2 data-start=\"1816\" data-end=\"1845\"\u003eTechnical Specifications\u003c\/h2\u003e \u003cul\u003e \u003cli data-start=\"1848\" data-end=\"1932\"\u003eHousing Size: 20″ standard length (≈50.8 cm)\u003c\/li\u003e \u003cli data-start=\"1935\" data-end=\"2041\"\u003eCartridge Compatibility: Fits filters up to ~4½″ diameter (≈11 cm)\u003c\/li\u003e \u003cli data-start=\"2044\" data-end=\"2138\"\u003ePort Size: Typically 1″ NPT female in high-flow models\u003c\/li\u003e \u003cli data-start=\"2141\" data-end=\"2229\"\u003eMax Working Pressure: ~6 bar \/ ~90 psi (typical)\u003c\/li\u003e \u003cli data-start=\"2232\" data-end=\"2327\"\u003eOperating Temperature: ~4 °C to ~38 °C (verify variant)\u003c\/li\u003e \u003cli data-start=\"2330\" data-end=\"2378\"\u003eSeal Type: Double O-Ring for extra reliability\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"2385\" data-end=\"2414\"\u003eWhy Choose This Housing?\u003c\/h3\u003e \u003cp data-start=\"2415\" data-end=\"2945\"\u003eWhen 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.\u003c\/p\u003e \u003ch3 data-start=\"2952\" data-end=\"2988\"\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e \u003col\u003e \u003cli data-start=\"2992\" data-end=\"3087\"\u003eInstall the housing vertically with sufficient clearance above the cap for cartridge removal?\u003c\/li\u003e \u003cli data-start=\"3091\" data-end=\"3170\"\u003eUse a sturdy bracket or wall-mount rated for full housing weight when filled.\u003c\/li\u003e \u003cli data-start=\"3174\" data-end=\"3277\"\u003eLubricate the O-rings lightly with food-grade silicone before inserting the cartridge and re-sealing.\u003c\/li\u003e \u003cli data-start=\"3281\" data-end=\"3372\"\u003ePress the pressure-relief button (if included) before opening for safe cartridge changes.\u003c\/li\u003e \u003cli data-start=\"3376\" data-end=\"3548\"\u003eReplace 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.\u003c\/li\u003e \u003cli data-start=\"3552\" data-end=\"3619\"\u003eAfter service, check for leaks and confirm flow meets expectations.\u003c\/li\u003e \u003c\/ol\u003e","brand":"Monster Mechanical","offers":[{"title":"Default","offer_id":45115709423685,"sku":"HOU20BBP","price":483.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/8627\/7445\/files\/20-inch-big-blue-filter-housing-chinese-3.jpg?v=1780903319","url":"https:\/\/www.monstermechanical.co.za\/products\/20-big-blue-water-filter-housing-puritech-double-o-ring","provider":"Monster Mechanical","version":"1.0","type":"link"}