{"title":"Specialty Filters - Big Blue 4.5\" Cartridges","description":"\u003cp\u003eSpecialty Filters - Big Blue 4.5\" Cartridges: Replacement filter cartridges, sorted by size and by what they remove.\u003c\/p\u003e\u003cp\u003eThis collection has 3 products from brands including Pentek, priced from $124 to $354. Shipping is free anywhere in the USA.\u003c\/p\u003e\u003cp\u003eNot sure which one fits your system? Call us at 813-897-9971 or email watersoftenerplus@gmail.com with your model or a photo of the label, and we will match the right part.\u003c\/p\u003e","products":[{"product_id":"rfc20-bb-pentek-radial-flow-cart-20-big-blue-155247-43","title":"Pentek Radial Flow Cart for 20-inch Big Blue filters — RFC20-BB, Pentek Radial Flow Cart 20 Big Blue, 155247-43","description":"\u003cp\u003e\u003cstrong\u003eReliable Pentek Radial Flow Cartridge for Superior Water Filtration and System Protection\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe RFC20-BB Pentek Radial Flow Cart 20 Big Blue cartridge is designed to address common issues like sediment buildup and water contamination in filtration systems. Unlike standard filters, this cartridge offers efficient radial flow technology that maximizes surface area and extends filter life. Ideal for applications requiring dependable filter cartridges and housings, it ensures your water treatment setup remains clean, efficient, and hassle-free.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eProtects your water system from sediment and particulate buildup for longer equipment lifespan\u003c\/li\u003e\n  \u003cli\u003eEnhances filtration efficiency with radial flow design, reducing pressure drop\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 20-inch Big Blue housings for easy integration\u003c\/li\u003e\n  \u003cli\u003eDurable construction supports consistent performance under varied operating conditions\u003c\/li\u003e\n  \u003cli\u003eReduces maintenance frequency by capturing more contaminants before clogging\u003c\/li\u003e\n  \u003cli\u003eSupports clearer, cleaner water output for improved system safety and user satisfaction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThis Pentek radial flow cartridge functions by directing water through its specially designed filter media in a radial pattern. This increases the surface area exposed to water, allowing the cartridge to capture more sediment and particulates compared to conventional axial flow filters. As water passes through, contaminants are trapped within the cartridge, preventing them from entering your water system and causing damage or inefficiency.\u003c\/p\u003e\n\u003cp\u003eInstalled inside a compatible 20-inch Big Blue housing, the RFC20-BB ensures that your water treatment system maintains optimal flow rates while delivering high-quality filtration performance.\u003c\/p\u003e\n\n\u003ch2\u003eWhat to Expect\u003c\/h2\u003e\n\u003cp\u003eOnce installed, you’ll immediately notice improved water clarity as the filter cartridge efficiently removes sediment and other impurities. During the first few weeks, the cartridge will continue to capture particles without significant pressure loss, supporting smooth system operation. Over time, its radial flow design helps distribute contaminants evenly, reducing the need for early replacement and minimizing downtime for maintenance.\u003c\/p\u003e\n\u003cp\u003eWith proper use, this cartridge offers reliable filtration performance over extended periods, making it a practical choice for residential or commercial water systems that demand consistent, high-quality water treatment.\u003c\/p\u003e\n\n\u003ch2\u003eWhat’s Inside\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eRadial Flow Filter Media – maximizes filtration surface area for enhanced contaminant capture\u003c\/li\u003e\n  \u003cli\u003eDurable Polypropylene Core – provides robust structural support for stable filtration under pressure\u003c\/li\u003e\n  \u003cli\u003eBig Blue Compatible Dimensions – ensures seamless fit within standard 20-inch housings\u003c\/li\u003e\n  \u003cli\u003eHigh-Quality Seal Gasket – prevents leaks and maintains system integrity during operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the water supply to the filter housing before beginning installation.\u003c\/li\u003e\n  \u003cli\u003eRelieve pressure by opening a nearby faucet or using the pressure release valve on the housing.\u003c\/li\u003e\n  \u003cli\u003eUnscrew the Big Blue housing carefully and remove the old filter cartridge.\u003c\/li\u003e\n  \u003cli\u003eInsert the RFC20-BB Pentek Radial Flow Cartridge into the housing, ensuring proper alignment.\u003c\/li\u003e\n  \u003cli\u003eCheck the gasket for any debris and ensure it is seated correctly to prevent leaks.\u003c\/li\u003e\n  \u003cli\u003eScrew the housing back onto the filter head securely by hand, avoiding overtightening.\u003c\/li\u003e\n  \u003cli\u003eTurn the water supply back on and check for leaks before resuming normal use.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eWhy Choose This Product\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConstructed with high-quality materials to ensure durability and consistent filtration performance\u003c\/li\u003e\n  \u003cli\u003eTrusted vendor with expertise in water softening and filtration components\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for compatibility with Big Blue housings, simplifying upgrades and replacements\u003c\/li\u003e\n  \u003cli\u003eOptimized radial flow technology offers superior efficiency compared to traditional cartridge filters\u003c\/li\u003e\n  \u003cli\u003eSupports a wide range of water treatment system applications, from residential to light commercial use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ \u0026amp; Safety\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cartridge compatible with all 20-inch Big Blue filter housings?\u003c\/strong\u003e\u003cbr\u003eYes, the RFC20-BB is designed to fit standard 20-inch Big Blue housings commonly used in residential and commercial water systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I replace this filter cartridge?\u003c\/strong\u003e\u003cbr\u003eReplacement frequency depends on water quality and usage but typically ranges from 3 to 6 months for optimal performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this filter with softened or untreated water?\u003c\/strong\u003e\u003cbr\u003eThe cartridge works effectively with both softened and untreated water to reduce sediment and particulate contaminants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat operating pressures can this cartridge handle?\u003c\/strong\u003e\u003cbr\u003eThe RFC20-BB is rated for typical residential and commercial water pressures up to 125 psi.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs any special maintenance required after installation?\u003c\/strong\u003e\u003cbr\u003eRegular inspection and timely replacement of the cartridge are recommended; no additional maintenance is necessary.\u003c\/p\u003e\n\n\u003cp\u003eUpgrade your system reliability today—add the RFC20-BB Pentek Radial Flow Cartridge to your cart and keep your water flowing clean and consistent.\u003c\/p\u003e","brand":"Pentek","offers":[{"title":"Default Title","offer_id":44819862552629,"sku":"780851339621","price":210.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/4950\/2261\/files\/rfc20-bb-r1200.jpg?v=1789609766"},{"product_id":"rfc-bb-pentek-radial-flow-cart-10-big-blue-155141-43","title":"Pentek Radial Flow Cart for 10 Big Blue filters — RFC-BB, Pentek Radial Flow Cart 10 Big Blue, 155141-43","description":"\u003cp\u003e\u003cstrong\u003eHigh-Performance Radial Flow Filter Cartridge for Superior Water Filtration\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe RFC-BB Pentek Radial Flow Cartridge 10 Big Blue, model 155141-43, offers a reliable and efficient solution to common water filtration challenges. Designed to tackle sediment and particulate contaminants, this filter cartridge enhances your water treatment system’s performance while protecting downstream equipment. As a trusted component in filter cartridges, it ensures cleaner water and longer system life with minimal maintenance.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDelivers consistent filtration performance to protect your water system from sediment buildup\u003c\/li\u003e\n  \u003cli\u003eEnhances water clarity and quality by efficiently removing fine particles\u003c\/li\u003e\n  \u003cli\u003eDurable construction ensures long-lasting use and reliable operation\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 10 Big Blue housings for easy installation\u003c\/li\u003e\n  \u003cli\u003eSupports safer water flow by reducing contaminants that can damage plumbing and appliances\u003c\/li\u003e\n  \u003cli\u003eLightweight design allows for hassle-free handling and replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThe RFC-BB Pentek Radial Flow Cartridge operates by directing water radially from the outside toward the center core, allowing sediment and particles to be trapped within the filter media. This radial flow design maximizes surface area usage, improving filtration efficiency and extending cartridge life. Installed within a compatible 10 Big Blue housing, it serves as a critical barrier in your water filtration system, capturing impurities before they reach faucets or water-using appliances.\u003c\/p\u003e\n\u003cp\u003eBy filtering out suspended solids and sediment, this cartridge helps maintain optimal water flow and protects your entire water treatment setup from clogging and wear. The design also facilitates easy replacement without disturbing the overall system.\u003c\/p\u003e\n\n\u003ch2\u003eWhat to Expect\u003c\/h2\u003e\n\u003cp\u003eOnce installed, you will notice a marked improvement in water clarity and reduced sediment presence almost immediately. In the first days and weeks of use, the cartridge efficiently traps particles without impacting water pressure significantly. Over time, the cartridge’s radial flow design helps maintain consistent filtration performance, reducing the frequency of replacements.\u003c\/p\u003e\n\u003cp\u003eRoutine maintenance involves monitoring water quality and replacing the cartridge as sediment load increases. Its robust build ensures dependable operation, minimizing downtime and maintenance efforts for your water treatment system.\u003c\/p\u003e\n\n\u003ch2\u003eWhat’s Inside\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-grade filter media – captures fine sediment and particulate contaminants effectively\u003c\/li\u003e\n  \u003cli\u003eRadial flow design structure – maximizes filtration surface area for improved efficiency\u003c\/li\u003e\n  \u003cli\u003eDurable core – maintains cartridge shape and supports water flow integrity\u003c\/li\u003e\n  \u003cli\u003eStandard 10 Big Blue size – ensures compatibility with common filter housings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the water supply to the filter housing.\u003c\/li\u003e\n  \u003cli\u003eRelease pressure by opening a nearby faucet.\u003c\/li\u003e\n  \u003cli\u003eUnscrew the housing and carefully remove the old filter cartridge.\u003c\/li\u003e\n  \u003cli\u003eInsert the RFC-BB Pentek Radial Flow Cartridge into the housing, ensuring proper alignment.\u003c\/li\u003e\n  \u003cli\u003eReattach the housing securely and turn the water supply back on.\u003c\/li\u003e\n  \u003cli\u003eCheck for leaks and allow water to flow through the system for a few minutes to flush any loose particles.\u003c\/li\u003e\n  \u003cli\u003eReset any system indicators if applicable.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eWhy Choose This Product\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eEngineered with quality materials for dependable filtration and long-term durability\u003c\/li\u003e\n  \u003cli\u003eManufactured by Water Softener Plus, a trusted vendor known for reliable water treatment components\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically to fit 10 Big Blue housings, ensuring seamless integration with your existing setup\u003c\/li\u003e\n  \u003cli\u003eOptimizes system efficiency by reducing sediment-related wear and tear on plumbing and appliances\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ \u0026amp; Safety\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this filter cartridge compatible with all 10 Big Blue housings?\u003c\/strong\u003e\u003cbr\u003eYes, the RFC-BB Pentek Radial Flow Cartridge is designed to fit standard 10 Big Blue filter housings commonly used in residential and commercial water systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow often should I replace this cartridge?\u003c\/strong\u003e\u003cbr\u003eReplacement frequency depends on water quality and usage but typically ranges from 3 to 6 months or when you notice a drop in water flow or quality.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I clean and reuse this filter cartridge?\u003c\/strong\u003e\u003cbr\u003eThis cartridge is intended for single use and should be replaced rather than cleaned to maintain optimal filtration performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum operating temperature for this cartridge?\u003c\/strong\u003e\u003cbr\u003eIt is designed to operate safely up to typical cold water temperatures found in household and light commercial applications, usually up to 100°F (38°C).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs installation difficult for someone without plumbing experience?\u003c\/strong\u003e\u003cbr\u003eThe cartridge installation is straightforward and can be done safely with basic tools by following the step-by-step instructions provided.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this cartridge reduce chemical contaminants?\u003c\/strong\u003e\u003cbr\u003eThis radial flow cartridge is primarily designed for sediment filtration and does not remove chemical contaminants; consider additional filtration stages if chemical removal is required.\u003c\/p\u003e\n\n\u003cp\u003eUpgrade your system reliability today—add the RFC-BB Pentek Radial Flow Cartridge 10 Big Blue to your cart and keep your water flowing clean and consistent.\u003c\/p\u003e","brand":"Pentek","offers":[{"title":"Default Title","offer_id":44819864322101,"sku":"780851339622","price":124.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/4950\/2261\/files\/rfc-bb-pentek-radial-flow-cart-10-big-blue-155141-43-hires-r1200.jpg?v=1789609757"},{"product_id":"bbf1-20mb-pentek-mixed-bed-di-cartridge-20-bb-155281-43","title":"Pentek 20-inch mixed bed DI filter cartridge — BBF1-20MB, Pentek Mixed Bed Di Cartridge 20 Bb, 155281-43","description":"\u003cp\u003e\u003cstrong\u003ePremium Pentek Mixed Bed DI Cartridge for Superior Water Purification and System Longevity\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen it comes to achieving ultra-pure water, the BBF1-20MB Pentek Mixed Bed DI Cartridge stands out as a dependable solution. Designed specifically for use in high-performance water treatment systems, this 20-inch cartridge efficiently removes dissolved ionic impurities, ensuring your water is crystal clear and safe for sensitive applications. Its role as a mixed bed deionization cartridge makes it an essential component for any advanced filtration setup seeking consistent, high-quality water output.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDelivers exceptional deionization performance for ultra-pure water quality.\u003c\/li\u003e\n  \u003cli\u003eProlongs equipment lifespan by preventing scale and mineral buildup.\u003c\/li\u003e\n  \u003cli\u003eReduces the need for frequent system maintenance with durable resin media.\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 20-inch filter housings for easy integration.\u003c\/li\u003e\n  \u003cli\u003eCompact design ensures minimal pressure drop and efficient flow.\u003c\/li\u003e\n  \u003cli\u003eIdeal for both residential and commercial water softening and purification systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThe BBF1-20MB cartridge operates by combining cation and anion exchange resins within a single mixed bed configuration. As water passes through the cartridge, positively charged ions such as calcium and magnesium are exchanged for hydrogen ions, while negatively charged ions like chloride and sulfate are replaced with hydroxyl ions. This dual action removes dissolved ionic contaminants, effectively deionizing the water and producing a neutral pH output.\u003c\/p\u003e\n\u003cp\u003eInstalled within a water softener or filtration system, this cartridge complements pre-filters by targeting impurities that standard filtration cannot, ensuring the highest level of water purity for sensitive equipment or processes.\u003c\/p\u003e\n\n\u003ch2\u003eWhat to Expect\u003c\/h2\u003e\n\u003cp\u003eOnce installed, you will immediately notice improved water clarity and a reduction in scaling and mineral deposits on fixtures and appliances. In the first few days and weeks of use, the cartridge delivers consistent deionization performance, maintaining low total dissolved solids (TDS) levels.\u003c\/p\u003e\n\u003cp\u003eOver time, the resin media's effectiveness will gradually diminish, typically requiring replacement depending on water quality and usage volume. Regular monitoring of water parameters will help optimize cartridge replacement intervals and maintain peak system performance.\u003c\/p\u003e\n\n\u003ch2\u003eWhat’s Inside\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMixed Bed Ion Exchange Resin – Combines cation and anion resins to remove a broad spectrum of dissolved ions.\u003c\/li\u003e\n  \u003cli\u003eDurable Polypropylene Housing – Ensures chemical resistance and structural integrity under typical water treatment conditions.\u003c\/li\u003e\n  \u003cli\u003eEnd Caps with Sealing Gaskets – Provide leak-proof installation and secure placement within standard 20-inch housings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the water supply and relieve system pressure before cartridge replacement.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing cartridge by unscrewing the filter housing.\u003c\/li\u003e\n  \u003cli\u003eInsert the BBF1-20MB Pentek Mixed Bed DI Cartridge into the housing, ensuring proper orientation.\u003c\/li\u003e\n  \u003cli\u003eSecurely reassemble the filter housing, checking that all seals are properly seated.\u003c\/li\u003e\n  \u003cli\u003eSlowly restore water flow and inspect for leaks.\u003c\/li\u003e\n  \u003cli\u003eFlush the system as recommended by your water treatment setup to remove any initial resin fines.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eWhy Choose This Product\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured with high-quality resin media for reliable and consistent performance.\u003c\/li\u003e\n  \u003cli\u003eTrusted by water treatment professionals and compatible with a wide range of systems.\u003c\/li\u003e\n  \u003cli\u003eDesigned for easy installation and maintenance within standard 20-inch filter housings.\u003c\/li\u003e\n  \u003cli\u003eOptimizes water purity, protecting sensitive equipment and enhancing system efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ \u0026amp; Safety\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cartridge compatible with all water softener systems?\u003c\/strong\u003e\u003cbr\u003eIt is compatible with most systems that accept 20-inch standard filter cartridges, but always verify dimensions and specifications before purchase.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow often should I replace the BBF1-20MB cartridge?\u003c\/strong\u003e\u003cbr\u003eReplacement frequency depends on water quality and usage; typically, monitoring TDS levels will guide the ideal replacement schedule.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I install this cartridge myself?\u003c\/strong\u003e\u003cbr\u003eYes, installation is straightforward and designed for user-friendly replacement, but always follow safety precautions and system guidelines.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre there any special operating conditions?\u003c\/strong\u003e\u003cbr\u003eThis cartridge performs best within typical residential or commercial water treatment parameters; avoid exposure to extreme temperatures or pressures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I dispose of used cartridges?\u003c\/strong\u003e\u003cbr\u003eFollow local regulations for disposal of ion exchange resins and plastic components, or consult your water treatment professional.\u003c\/p\u003e\n\n\u003cp\u003eUpgrade your system reliability today—add this component to your cart and keep your water flowing clean and consistent.\u003c\/p\u003e","brand":"Pentek","offers":[{"title":"Default Title","offer_id":44819865370677,"sku":"780851338341","price":354.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/4950\/2261\/files\/bbf1-20mb-pentek-mixed-bed-di-cartridge-20-bb-155281-43-hires-r1200.jpg?v=1789593650"}],"url":"https:\/\/checkout.watersoftenerplus.com\/collections\/specialty-filters-big-blue-4-5-inch-cartridges.oembed","provider":"Water Softener Plus","version":"1.0","type":"link"}