{"product_id":"refill-case-20-fat-4-5-diameter-refillable-filter-cartridge-puritech","title":"Refill Case 20″ Fat (4.5″ Diameter) | Refillable Filter Cartridge – Puritech","description":"\u003ch1\u003eRefill Case 20″ Fat (4.5″ Diameter) – Refillable Filter Cartridge\u003c\/h1\u003e \u003ch3 data-start=\"682\" data-end=\"696\"\u003eOverview\u003c\/h3\u003e \u003cp data-start=\"697\" data-end=\"1049\"\u003eUpgrade your water filtration setup with our robust 20″ Fat (4.5″ diameter) refill case. Designed for performance and versatility, this refillable filter cartridge allows you to customise your filtration media for the exact water quality challenges you face. Whether used in a residential or commercial setting, it delivers reliability and flexibility.\u003c\/p\u003e \u003ch3 data-start=\"1051\" data-end=\"1069\"\u003eKey Features\u003c\/h3\u003e \u003cul\u003e \u003cli data-start=\"1072\" data-end=\"1174\"\u003eSize: \u003cstrong data-start=\"1078\" data-end=\"1104\"\u003e20″ Fat, 4.5″ diameter\u003c\/strong\u003e – accommodates greater media volume than standard slimmer housings.\u003c\/li\u003e \u003cli data-start=\"1177\" data-end=\"1289\"\u003eMaterial: Durable \u003cstrong data-start=\"1195\" data-end=\"1224\"\u003ewhite polypropylene shell\u003c\/strong\u003e — strong, corrosion resistant and built for long-term service.\u003c\/li\u003e \u003cli data-start=\"1292\" data-end=\"1419\"\u003eRefillable: Empty cartridge ready to be filled with your preferred filtration media (activated carbon, KDF, resin, siliphos).\u003c\/li\u003e \u003cli data-start=\"1422\" data-end=\"1519\"\u003eBuilt-in pre- \u0026amp; post-filters: Prevent media loss during use, ensuring safe and clean operation.\u003c\/li\u003e \u003cli data-start=\"1522\" data-end=\"1612\"\u003eUniversal fit: Compatible with most standard residential and commercial filter housings.\u003c\/li\u003e \u003cli data-start=\"1615\" data-end=\"1716\"\u003eTailored for: Custom water treatment systems; great for when you want to control the exact media mix.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"1718\" data-end=\"1738\"\u003eSpecifications\u003c\/h3\u003e \u003cul\u003e \u003cli data-start=\"1741\" data-end=\"1772\"\u003eSize: 20″ Fat (4.5″ diameter)\u003c\/li\u003e \u003cli data-start=\"1775\" data-end=\"1790\"\u003eColour: White\u003c\/li\u003e \u003cli data-start=\"1793\" data-end=\"1818\"\u003eMaterial: Polypropylene\u003c\/li\u003e \u003cli data-start=\"1821\" data-end=\"1838\"\u003eRefillable: Yes\u003c\/li\u003e \u003cli data-start=\"1841\" data-end=\"1928\"\u003eMedia compatibility: Carbon, KDF, Resin, Siliphos (and other suitable filtration media)\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"1930\" data-end=\"1944\"\u003eBenefits\u003c\/h3\u003e \u003cul\u003e \u003cli data-start=\"1947\" data-end=\"2091\"\u003e\n\u003cstrong data-start=\"1947\" data-end=\"1964\"\u003eCustomisation\u003c\/strong\u003e: Unlike fixed cartridges, this refill case gives you the freedom to select your media based on your own water quality needs.\u003c\/li\u003e \u003cli data-start=\"2094\" data-end=\"2180\"\u003e\n\u003cstrong data-start=\"2094\" data-end=\"2112\"\u003eCost-effective\u003c\/strong\u003e: Refill only the media rather than replacing the whole cartridge.\u003c\/li\u003e \u003cli data-start=\"2183\" data-end=\"2313\"\u003e\n\u003cstrong data-start=\"2183\" data-end=\"2200\"\u003eHigh capacity\u003c\/strong\u003e: The “Fat” size accommodates more media volume, extending service life and reducing frequency of replacements.\u003c\/li\u003e \u003cli data-start=\"2316\" data-end=\"2437\"\u003e\n\u003cstrong data-start=\"2316\" data-end=\"2330\"\u003eDurability\u003c\/strong\u003e: With a strong polypropylene body, it withstands the conditions present in many water filtration setups.\u003c\/li\u003e \u003cli data-start=\"2440\" data-end=\"2534\"\u003e\n\u003cstrong data-start=\"2440\" data-end=\"2455\"\u003eFlexibility\u003c\/strong\u003e: Suitable for both domestic and light commercial water treatment applications.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"2536\" data-end=\"2551\"\u003eUse Cases\u003c\/h3\u003e \u003cul\u003e \u003cli data-start=\"2554\" data-end=\"2667\"\u003eIdeal for households with high sediment or varied contaminants wishing to customise media (e.g., carbon + KDF).\u003c\/li\u003e \u003cli data-start=\"2670\" data-end=\"2793\"\u003ePerfect for water refill shops, bottling plants, or commercial sites where filter media needs differ or change over time.\u003c\/li\u003e \u003cli data-start=\"2796\" data-end=\"2925\"\u003eFits into existing 20″ filter housing infrastructure, making it an easy upgrade for systems requiring larger diameter cartridges.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"2927\" data-end=\"2964\"\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e \u003cul\u003e \u003cli data-start=\"2967\" data-end=\"3076\"\u003eEnsure your housing is rated for the 4.5″ diameter cartridge and that O-rings\/gaskets are correctly seated.\u003c\/li\u003e \u003cli data-start=\"3079\" data-end=\"3234\"\u003eChoose your media based on water test results: e.g., activated carbon for taste\/odour removal, KDF for heavy metals, resin for hardness or specific ions.\u003c\/li\u003e \u003cli data-start=\"3237\" data-end=\"3377\"\u003eAfter filling the media and installing the cartridge, flush your system according to the manufacturer’s instructions to remove any residual fines.\u003c\/li\u003e \u003cli data-start=\"3380\" data-end=\"3502\"\u003eMonitor pressure drop weekly; if your system shows increased restriction, it may be time to replace or refill the media.\u003c\/li\u003e \u003cli data-start=\"3505\" data-end=\"3624\"\u003eHouse the cartridge in a clean environment. Replace or rinse pre- and post-filters as required to maintain optimal performance.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"3626\" data-end=\"3651\"\u003eWhy Choose Puritech\u003c\/h3\u003e \u003cp data-start=\"3652\" data-end=\"3962\"\u003eAt Puritech, we specialise in advanced water filtration solutions and supply high-quality components for both home and industrial use. Our products, including this refill case, are backed by expertise, robust manufacturing, and dedicated support. Choose Puritech for reliability and clarity in water treatment.\u003c\/p\u003e \u003ch2 data-start=\"4165\" data-end=\"4173\"\u003eFAQ\u003c\/h2\u003e \u003cp data-start=\"4174\" data-end=\"5356\"\u003e\u003cstrong data-start=\"4174\" data-end=\"4231\"\u003eQ: Will this cartridge fit my current filter housing?\u003c\/strong\u003e\u003cbr data-start=\"4231\" data-end=\"4234\"\u003eA: If your housing accepts a 20″ “Fat” format (approx. 4.5″ diameter internal), yes — measure your internal diameter and length to confirm compatibility.\u003cbr data-start=\"4387\" data-end=\"4390\"\u003e\u003cstrong data-start=\"4390\" data-end=\"4430\"\u003eQ: What media should I fill it with?\u003c\/strong\u003e\u003cbr data-start=\"4430\" data-end=\"4433\"\u003eA: That depends on your water quality goals. Activated carbon is ideal for removing chlorine\/taste\/odour; KDF is excellent for heavy metals or bacteria reduction; resin or siliphos can target scale, hardness or specific ions.\u003cbr data-start=\"4658\" data-end=\"4661\"\u003e\u003cstrong data-start=\"4661\" data-end=\"4707\"\u003eQ: How often should the media be replaced?\u003c\/strong\u003e\u003cbr data-start=\"4707\" data-end=\"4710\"\u003eA: It depends on your water usage volume, contamination level, and flow rate. Monitor system performance (flow reduction, pressure drop, taste\/odour changes) as indicators.\u003cbr data-start=\"4882\" data-end=\"4885\"\u003e\u003cstrong data-start=\"4885\" data-end=\"4938\"\u003eQ: Is this cartridge suitable for commercial use?\u003c\/strong\u003e\u003cbr data-start=\"4938\" data-end=\"4941\"\u003eA: Yes — it is designed for both residential and commercial filter housings.\u003cbr data-start=\"5017\" data-end=\"5020\"\u003e\u003cstrong data-start=\"5020\" data-end=\"5057\"\u003eQ: What are the delivery options?\u003c\/strong\u003e\u003cbr data-start=\"5057\" data-end=\"5060\"\u003eA: We offer next-day delivery (see our delivery policy) for orders placed before the cut-off time.\u003cbr data-start=\"5158\" data-end=\"5161\"\u003e\u003cstrong data-start=\"5161\" data-end=\"5201\"\u003eQ: What if I need technical support?\u003c\/strong\u003e\u003cbr data-start=\"5201\" data-end=\"5204\"\u003eA: Contact our team at +27 10 020 1600 or via email \u003ca class=\"decorated-link cursor-pointer\" rel=\"noopener\" data-start=\"5256\" data-end=\"5278\"\u003eterence@puritech.co.za\u003c\/a\u003e and we’ll help you with installation advice, media choices, and compatibility.\u003c\/p\u003e","brand":"Monster Mechanical","offers":[{"title":"Default","offer_id":45115712241733,"sku":"REFILL20BB","price":303.6,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/8627\/7445\/files\/20-inch-big-blue-refill-cases.jpg?v=1780903405","url":"https:\/\/www.monstermechanical.co.za\/products\/refill-case-20-fat-4-5-diameter-refillable-filter-cartridge-puritech","provider":"Monster Mechanical","version":"1.0","type":"link"}