{"product_id":"big-blue-20-in-heavy-duty-water-filter-housing-high-flow-design","title":"Big Blue 20-in Heavy Duty Water Filter Housing - High Flow Design","description":"\u003cp\u003eIn this review the Pentair Pentek Big Blue 20-in heavy duty filter housing is assessed for homeowners and light commercial users who need large-capacity sediment or carbon filtration with minimal pressure drop. The single biggest reason to consider it is capacity: the extra-large sump accepts 4-1\/2 in diameter, 20-in cartridges so fewer vessels are required for high flow applications. The review highlights practical installation notes, materials compatibility, and customer-reported durability so buyers know what to expect before fitting it into a whole-house system.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtra-large sump:\u003c\/strong\u003e The 20-in length provides greater cartridge capacity so systems can handle higher flow rates with fewer housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flow Polypropylene cap:\u003c\/strong\u003e The HFPP cap and 1 in NPT ports improve flow handling and reduce pressure drop on heavy-sediment lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple port sizes available:\u003c\/strong\u003e Cap options include 3\/4 in, 1 in or 1-1\/2 in inlet and outlet ports to suit a range of plumbing setups and flow needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e The polypropylene construction is compatible with a broad range of common treatment chemicals used in residential and light industrial filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure relief option:\u003c\/strong\u003e Available with a pressure relief button that makes cartridge changes easier and safer by relieving trapped pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Big Blue 20-in housing is best for homeowners, landlords or small commercial sites that need whole-house sediment or carbon filtration with high flow capacity. It suits systems where reducing vessel count and keeping pressure drop low are priorities, for example well water or municipal feed lines serving multiple fixtures.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include users requiring specialty media housings smaller than 4-1\/2 in diameter, or applications needing stainless steel wetted parts for aggressive chemistries. If ultra-long-term outdoor exposure is expected, consider additional weather protection or an alternative material choice due to mixed long-term durability feedback.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLarge 20-in sump significantly increases cartridge capacity, reducing paired housings for high flow systems.\u003c\/li\u003e\n\u003cli\u003eHFPP cap and 1 in NPT ports help maintain flow with minimal pressure drop in typical installations.\u003c\/li\u003e\n\u003cli\u003eGood chemical compatibility and availability of a pressure relief button make maintenance easier.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers reported long-term splitting after several years of service, so outdoor or extreme conditions may affect lifespan.\u003c\/li\u003e\n\u003cli\u003eHardware and fittings are not always included in every purchase, so buyers should verify what is supplied before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel type\u003c\/td\u003e\n\u003ctd\u003eBig Blue heavy duty filter housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSump length\u003c\/td\u003e\n\u003ctd\u003e20 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCartridge diameter\u003c\/td\u003e\n\u003ctd\u003e4-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap material\u003c\/td\u003e\n\u003ctd\u003eHigh-Flow Polypropylene (HFPP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePort options\u003c\/td\u003e\n\u003ctd\u003e3\/4 in, 1 in, 1-1\/2 in NPT inlet\/outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure relief\u003c\/td\u003e\n\u003ctd\u003eAvailable with pressure relief button\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\/Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Big Blue 20-in housing is a practical, cost-effective choice for whole-house or light commercial filtration where high flow and large cartridge capacity matter. It offers reliable flow performance and sensible service features, and represents good value for DIY installers and facilities managers, though buyers should account for installation fittings and consider environmental protection for the longest service life.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this housing accept standard 20-in cartridges?\u003c\/strong\u003e\u003cbr\u003eYes, it accepts a wide variety of 4-1\/2 in diameter, 20-in cartridges used for sediment and carbon filtration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the housing include a pressure relief button?\u003c\/strong\u003e\u003cbr\u003eSome versions are supplied with a pressure relief button; check the specific configuration to confirm inclusion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat inlet\/outlet sizes are available?\u003c\/strong\u003e\u003cbr\u003eThe HFPP cap is available with 3\/4 in, 1 in or 1-1\/2 in NPT inlet and outlet ports to match plumbing needs.\u003c\/p\u003e","brand":"Pentek","offers":[{"title":"Default Title","offer_id":48750528331995,"sku":"B0014C3IOS","price":79.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51gx4XdW1eL._SL1000.jpg?v=1778884998","url":"https:\/\/gearmusthave.com\/products\/big-blue-20-in-heavy-duty-water-filter-housing-high-flow-design","provider":"GearMustHave","version":"1.0","type":"link"}