{"title":"Water Filter Cartridges","description":"\u003ch2\u003eWater Filter Cartridges\u003c\/h2\u003e\u003cp\u003eShop Water Doctor filter cartridges and compatible parts by system model and size.\u003c\/p\u003e","products":[{"product_id":"water-doctor-alkaline-6-stage-cartridge-filter","title":"Water Doctor Alkaline 6-Stage Cartridge Filter","description":"\u003cp data-start=\"196\" data-end=\"345\"\u003eUpgrade your drinking water with the \u003cstrong data-start=\"233\" data-end=\"263\"\u003eAlkaline 6 Stage Cartridge\u003c\/strong\u003e, designed to remineralize, balance pH, and improve taste after RO purification.\u003c\/p\u003e\n\u003cul data-start=\"347\" data-end=\"1178\"\u003e\n\u003cli data-start=\"347\" data-end=\"501\"\u003e\n\u003cp data-start=\"349\" data-end=\"501\"\u003e\u003cstrong data-start=\"349\" data-end=\"382\"\u003e6-in-1 Multi-Layer Filtration\u003c\/strong\u003e – Combines \u003cstrong data-start=\"394\" data-end=\"462\"\u003emineral stones, tourmaline, alkaline media, and activated carbon\u003c\/strong\u003e for comprehensive water enhancement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"502\" data-end=\"860\"\u003e\n\u003cp data-start=\"504\" data-end=\"525\"\u003e\u003cstrong data-start=\"504\" data-end=\"521\"\u003eCore Function\u003c\/strong\u003e –\u003c\/p\u003e\n\u003cul data-start=\"528\" data-end=\"860\"\u003e\n\u003cli data-start=\"528\" data-end=\"613\"\u003e\n\u003cp data-start=\"530\" data-end=\"613\"\u003e\u003cstrong data-start=\"530\" data-end=\"557\"\u003eAdds essential minerals\u003c\/strong\u003e (calcium, magnesium, potassium) to improve nutrition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"616\" data-end=\"686\"\u003e\n\u003cp data-start=\"618\" data-end=\"686\"\u003e\u003cstrong data-start=\"618\" data-end=\"650\"\u003eRaises pH to alkaline levels\u003c\/strong\u003e for better hydration and balance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"689\" data-end=\"775\"\u003e\n\u003cp data-start=\"691\" data-end=\"775\"\u003e\u003cstrong data-start=\"691\" data-end=\"709\"\u003eImproves taste\u003c\/strong\u003e by polishing RO-purified water, making it fresher and smoother.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"778\" data-end=\"860\"\u003e\n\u003cp data-start=\"780\" data-end=\"860\"\u003e\u003cstrong data-start=\"780\" data-end=\"828\"\u003eReduces residual odor and organic impurities\u003c\/strong\u003e, ensuring clean, crisp water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"861\" data-end=\"970\"\u003e\n\u003cp data-start=\"863\" data-end=\"970\"\u003e\u003cstrong data-start=\"863\" data-end=\"890\"\u003eUniversal Inline Design\u003c\/strong\u003e – Compatible with most \u003cstrong data-start=\"914\" data-end=\"950\"\u003eRO systems and under-sink setups\u003c\/strong\u003e as a post-filter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"971\" data-end=\"1071\"\u003e\n\u003cp data-start=\"973\" data-end=\"1071\"\u003e\u003cstrong data-start=\"973\" data-end=\"994\"\u003eEasy Installation\u003c\/strong\u003e – Inline quick-connect design allows \u003cstrong data-start=\"1032\" data-end=\"1068\"\u003etool-free replacement in minutes\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1072\" data-end=\"1178\"\u003e\n\u003cp data-start=\"1074\" data-end=\"1178\"\u003e\u003cstrong data-start=\"1074\" data-end=\"1107\"\u003eRecommended Replacement Cycle\u003c\/strong\u003e – Replace every \u003cstrong data-start=\"1124\" data-end=\"1137\"\u003e12 months\u003c\/strong\u003e, depending on water quality and usage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1180\" data-end=\"1285\"\u003ePerfect for families who want \u003cstrong data-start=\"1210\" data-end=\"1258\"\u003ealkaline, mineral-rich, and refreshing water\u003c\/strong\u003e straight from their tap.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"Default Title","offer_id":51210723557681,"sku":"WD-AKM6106","price":199.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/WD-AKM6106_23f9ca5e-a781-4187-8086-ba9cb4957ae2.jpg?v=1754682207"},{"product_id":"water-doctor-2-5-x-10-ro-replacement-filter-cartridges","title":"Water Doctor 2.5 x 10 Replacement Filter Cartridges – PP \/ CTO \/ GAC \/ T33 \/ RO","description":"\u003ch2\u003eStandard 2.5 x 10 replacement cartridges for RO and drinking water systems\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor 2.5 x 10 Replacement Filter Cartridges\u003c\/strong\u003e are standard-size cartridges for compatible drinking water and reverse osmosis systems. Choose from PP, CTO, GAC, T33 and RO membrane options based on the stage you are replacing.\u003c\/p\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCustomers maintaining compatible 2.5 x 10 drinking water systems\u003c\/li\u003e\n\u003cli\u003eRO pre-filter and post-filter replacement\u003c\/li\u003e\n\u003cli\u003eReplacing sediment, carbon, polishing or RO stages\u003c\/li\u003e\n\u003cli\u003eHomes that want to keep replacement cartridges on hand\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP\u003c\/strong\u003e sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTO\u003c\/strong\u003e carbon block cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGAC\u003c\/strong\u003e granular activated carbon cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT33\u003c\/strong\u003e inline taste polishing cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO\u003c\/strong\u003e membrane cartridge\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your housing size and system compatibility before purchasing. These are standard 2.5 x 10 cartridges and are not the same as COMO tankless, GF3, ROS4A quick-twist or ROS4B cartridges.\u003c\/p\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on water quality, usage and the cartridge type being replaced.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PP","offer_id":51912521089329,"sku":"PP-1005M","price":12.99,"currency_code":"CAD","in_stock":true},{"title":"CTO","offer_id":51912521122097,"sku":"CTO-1005M","price":14.99,"currency_code":"CAD","in_stock":true},{"title":"GAC","offer_id":51912521154865,"sku":"GAC-1005M","price":14.99,"currency_code":"CAD","in_stock":true},{"title":"T33","offer_id":51938823340337,"sku":"IL-0210T33","price":30.0,"currency_code":"CAD","in_stock":true},{"title":"RO","offer_id":51938881372465,"sku":"TW30-1812-50","price":69.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/PP-20B05M.jpg?v=1754685943"},{"product_id":"water-doctor-como-r700-replacement-filter-cartridges","title":"Water Doctor COMO-R700 Replacement Filter Cartridges – PCB \/ RO","description":"\u003ch2\u003eGenuine replacement cartridges for the COMO-R700 tankless RO system\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor COMO-R700 Replacement Filter Cartridges\u003c\/strong\u003e are designed for the COMO-R700 tankless reverse osmosis system. Choose the PCB cartridge or RO cartridge based on your system’s maintenance needs.\u003c\/p\u003e\u003ch3\u003eCompatible system\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eWater Doctor COMO-R700 Tankless RO System\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCB cartridge\u003c\/strong\u003e for pre-filtration and carbon filtration before the RO stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO cartridge\u003c\/strong\u003e for the reverse osmosis stage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCustomers replacing filters in an existing COMO-R700 system\u003c\/li\u003e\n\u003cli\u003eMaintaining daily flow and drinking water taste\u003c\/li\u003e\n\u003cli\u003eKeeping the tankless RO system on schedule\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on source water conditions, household usage and system indicators. Use genuine Water Doctor COMO-R700 cartridges for proper fit.\u003c\/p\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your system model is COMO-R700 before purchasing. These cartridges are not interchangeable with COMO-R1000 or GF3 filters.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PCB","offer_id":51938589049137,"sku":"CM-R700PCB","price":89.99,"currency_code":"CAD","in_stock":true},{"title":"RO","offer_id":51938589081905,"sku":"CM-R700RO","price":159.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/PCB.png?v=1754682197"},{"product_id":"water-doctor-como-r1000-replacement-filter-cartridges","title":"Water Doctor COMO-R1000 Replacement Filter Cartridges – PPC \/ ROC","description":"\u003ch2\u003eGenuine replacement cartridges for the COMO-R1000 tankless RO system\u003c\/h2\u003e\u003cp\u003eKeep your \u003cstrong\u003eWater Doctor COMO-R1000 Tankless RO System\u003c\/strong\u003e performing properly with genuine replacement cartridges. This page includes the PPC pre-filter cartridge and ROC reverse osmosis cartridge designed for the COMO-R1000 model.\u003c\/p\u003e\u003ch3\u003eCompatible system\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eWater Doctor COMO-R1000 Tankless RO System\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePPC cartridge\u003c\/strong\u003e for pre-filtration before the RO stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eROC cartridge\u003c\/strong\u003e for the reverse osmosis stage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCustomers replacing filters in an existing COMO-R1000 system\u003c\/li\u003e\n\u003cli\u003eMaintaining water taste and flow performance\u003c\/li\u003e\n\u003cli\u003eKeeping the system on a regular maintenance schedule\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on source water quality, household usage and system indicators. For best fit and performance, use genuine Water Doctor COMO-R1000 cartridges.\u003c\/p\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your system model is COMO-R1000 before purchasing. These cartridges are not the same as COMO-R700 or GF3 replacement filters.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PPC","offer_id":51905375994161,"sku":"CM-R1000PPC","price":89.99,"currency_code":"CAD","in_stock":true},{"title":"ROC","offer_id":51905376026929,"sku":"CM-R1000ROC","price":179.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/CM-R1000PPC_55.jpg?v=1757874288"},{"product_id":"water-doctor-4-5-x-10-big-blue-replacement-filter-cartridges","title":"Water Doctor 4.5 x 10 Replacement Filter Cartridges – PP \/ PS \/ PL \/ CTO \/ GAC","description":"\u003ch2\u003eBig Blue 4.5 x 10 replacement filter cartridges\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor 4.5 x 10 Replacement Filter Cartridges\u003c\/strong\u003e are large-diameter cartridges for compatible Big Blue housings. Choose PP, PS, PL, CTO or GAC based on the type of filtration needed.\u003c\/p\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompatible 4.5 x 10 whole-home or point-of-entry housings\u003c\/li\u003e\n\u003cli\u003eCustomers replacing sediment or carbon cartridges\u003c\/li\u003e\n\u003cli\u003eHomes that need higher flow than slimline cartridges\u003c\/li\u003e\n\u003cli\u003ePre-filtration before other water treatment equipment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP\u003c\/strong\u003e sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePS\u003c\/strong\u003e spun sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePL\u003c\/strong\u003e pleated sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTO\u003c\/strong\u003e carbon block cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGAC\u003c\/strong\u003e granular activated carbon cartridge\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your housing size is 4.5 x 10 before purchasing. These cartridges are not the same as 4.5 x 20 or slimline 2.5-inch cartridges.\u003c\/p\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement frequency depends on sediment load, water usage, pressure drop and cartridge type.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PP 4.5 x 10","offer_id":51898738573617,"sku":"PP-10B05M","price":17.99,"currency_code":"CAD","in_stock":true},{"title":"PS 4.5 x 10","offer_id":51898738606385,"sku":"PS-10B05M","price":19.99,"currency_code":"CAD","in_stock":true},{"title":"PL 4.5 x 10","offer_id":51898738639153,"sku":"PL-10B05M","price":19.99,"currency_code":"CAD","in_stock":true},{"title":"CTO 4.5 x 10","offer_id":51898738671921,"sku":"CTO-10B05M","price":36.99,"currency_code":"CAD","in_stock":true},{"title":"GAC 4.5 x 10","offer_id":51898738704689,"sku":"GAC-10B05M","price":36.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/PP-10B05M_ffd059cf-bedb-479f-95b6-5ba6ef004074.jpg?v=1759514996"},{"product_id":"water-doctor-4-5-x-20-big-blue-replacement-filter-cartridges","title":"Water Doctor 4.5 x 20 Replacement Filter Cartridges – PP \/ PS \/ PL \/ CTO \/ GAC","description":"\u003ch2\u003eBig Blue 4.5 x 20 replacement filter cartridges\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor 4.5 x 20 Replacement Filter Cartridges\u003c\/strong\u003e are large-format cartridges for compatible Big Blue housings and whole-home filtration setups. Choose PP, PL, PS, CTO or GAC depending on your filtration need and existing housing.\u003c\/p\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eWhole-home pre-filter housings using 4.5 x 20 cartridges\u003c\/li\u003e\n\u003cli\u003eCustomers replacing sediment or carbon cartridges\u003c\/li\u003e\n\u003cli\u003eHomes with higher flow needs than slimline housings\u003c\/li\u003e\n\u003cli\u003ePre-filtration before softeners, conditioners or UV systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP\u003c\/strong\u003e melt-blown sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePL\u003c\/strong\u003e pleated sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePS\u003c\/strong\u003e spun sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTO\u003c\/strong\u003e carbon block cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGAC\u003c\/strong\u003e granular activated carbon cartridge\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your housing size is 4.5 x 20 before purchasing. These cartridges are not the same as 4.5 x 10, 2.5 x 10 or 2.5 x 20 cartridges.\u003c\/p\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement frequency depends on sediment load, water usage, pressure drop and cartridge type.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PP 4.5 x 20","offer_id":51898771800369,"sku":"PP-20B05M-1","price":29.99,"currency_code":"CAD","in_stock":true},{"title":"PL 4.5 x 20","offer_id":51898771833137,"sku":"PL-20B05M","price":28.99,"currency_code":"CAD","in_stock":true},{"title":"PS 4.5 x 20","offer_id":51898771865905,"sku":"PS-20B05M","price":29.99,"currency_code":"CAD","in_stock":true},{"title":"CTO 4.5 x 20","offer_id":51898771898673,"sku":"CTO-20B05M","price":74.99,"currency_code":"CAD","in_stock":true},{"title":"GAC 4.5 x 20","offer_id":51898771931441,"sku":"GAC-20B05M","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/PP-20B05M.jpg?v=1754685943"},{"product_id":"water-doctor-2-5-x-20-replacement-filter-cartridges","title":"Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP \/ PS \/ PL \/ CTO \/ GAC","description":"\u003ch2\u003eSlimline 2.5 x 20 replacement filter cartridges\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor 2.5 x 20 Replacement Filter Cartridges\u003c\/strong\u003e are slimline cartridges for compatible 2.5\" x 20\" housings. Choose from PP, PL, PS, GAC and CTO options based on the filter stage and water conditions.\u003c\/p\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompatible 2.5 x 20 housings\u003c\/li\u003e\n\u003cli\u003ePoint-of-use or smaller point-of-entry filtration setups\u003c\/li\u003e\n\u003cli\u003eCustomers replacing sediment or carbon cartridges\u003c\/li\u003e\n\u003cli\u003eHomes that need a longer cartridge than 2.5 x 10 but not a Big Blue format\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP\u003c\/strong\u003e melt-blown sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePL\u003c\/strong\u003e pleated sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePS\u003c\/strong\u003e spun sediment cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGAC\u003c\/strong\u003e granular activated carbon cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTO\u003c\/strong\u003e carbon block cartridge\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your housing size is 2.5 x 20 before purchasing. These cartridges are not the same as 2.5 x 10, 4.5 x 10 or 4.5 x 20 cartridges.\u003c\/p\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement frequency depends on sediment load, water usage, pressure drop and cartridge type.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PP Melt-Blown Sediment","offer_id":51889276879153,"sku":"PP-2005M","price":19.99,"currency_code":"CAD","in_stock":true},{"title":"PL Pleated Sediment","offer_id":51889276911921,"sku":"PL-2005M","price":19.99,"currency_code":"CAD","in_stock":true},{"title":"PS Spun Sediment","offer_id":51889276944689,"sku":"PS-2005M","price":24.99,"currency_code":"CAD","in_stock":true},{"title":"GAC Granular Carbon","offer_id":51889276977457,"sku":"GAC-2005M","price":44.99,"currency_code":"CAD","in_stock":true},{"title":"CTO Carbon Block","offer_id":51889277010225,"sku":"CTO-2005M","price":39.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/PP-2005M_e2a5dbe5-70b9-487e-8267-af74abf8e6fa_21.png?v=1759263102"},{"product_id":"water-doctor-ros4a-quick-twist-replacement-cartridges","title":"Water Doctor ROS4A Replacement Filter Cartridges – PP \/ CTO \/ T33 \/ RO","description":"\u003ch2\u003eQuick-twist replacement cartridges for the Water Doctor ROS4A system\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor ROS4A Replacement Filter Cartridges\u003c\/strong\u003e are designed for the Water Doctor ROS4A 4-stage reverse osmosis system. Choose PP, CTO, T33 or RO250 depending on the filter stage that needs replacement.\u003c\/p\u003e\u003ch3\u003eCompatible system\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eWater Doctor ROS4A 4-Stage Undersink RO System\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP Quick Twist\u003c\/strong\u003e for sediment pre-filtration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTO Quick Twist\u003c\/strong\u003e for carbon block filtration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT33 Quick Twist\u003c\/strong\u003e for final taste polishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO250 Quick Twist\u003c\/strong\u003e for the reverse osmosis stage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCustomers maintaining an existing ROS4A system\u003c\/li\u003e\n\u003cli\u003eReplacing one filter stage at a time\u003c\/li\u003e\n\u003cli\u003eKeeping the RO system on a routine maintenance schedule\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on water conditions and household usage. For proper fit, confirm your system model is ROS4A before ordering.\u003c\/p\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003eThese are quick-twist ROS4A cartridges. They are not the same as standard 2.5 x 10 cartridges or ROS4B replacement filters.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PP Quick Twist","offer_id":51898701513009,"sku":"PP-ROF4A","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"CTO Quick Twist","offer_id":51898701545777,"sku":"CTO-ROF4A","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"T33 Quick Twist","offer_id":51898701578545,"sku":"T33-ROF4A","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"RO250 Quick Twist","offer_id":51898701611313,"sku":"RO-ROF4A","price":149.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/RO250-ROF4A.jpg?v=1754681817"},{"product_id":"water-doctor-ros4b-quick-twist-replacement-cartridges","title":"Water Doctor ROS4B Replacement Filter Cartridges – PP \/ CTO \/ T33 \/ RO","description":"\u003ch2\u003eReplacement cartridges for the Water Doctor ROS4B system\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor ROS4B Replacement Filter Cartridges\u003c\/strong\u003e are designed for the Water Doctor ROS4B 4-stage reverse osmosis system. Choose PP, CTO, T33 or RO depending on the cartridge stage that needs replacement.\u003c\/p\u003e\u003ch3\u003eCompatible system\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eWater Doctor ROS4B 4-Stage RO System\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP cartridge\u003c\/strong\u003e for sediment pre-filtration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTO cartridge\u003c\/strong\u003e for carbon block filtration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT33 cartridge\u003c\/strong\u003e for final taste polishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO cartridge\u003c\/strong\u003e for the reverse osmosis stage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCustomers maintaining an existing ROS4B system\u003c\/li\u003e\n\u003cli\u003eReplacing one filter stage at a time\u003c\/li\u003e\n\u003cli\u003eMaintaining flow, taste and routine system performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on water conditions and household usage. For proper fit, confirm your system model is ROS4B before ordering.\u003c\/p\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003eThese cartridges are for ROS4B. They are not the same as ROS4A quick-twist cartridges or standard 2.5 x 10 cartridges.\u003c\/p\u003e","brand":"Water Doctor","offers":[{"title":"PP","offer_id":51898580173105,"sku":"PP-10F","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"T33","offer_id":51938934128945,"sku":"T33-10F","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"CTO","offer_id":51898580238641,"sku":"CTO-10F","price":49.99,"currency_code":"CAD","in_stock":true},{"title":"RO","offer_id":51898580205873,"sku":"RO-10F","price":149.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/1_58.jpg?v=1754684851"},{"product_id":"water-doctor-excelight-compatible-uv-lamp-sleeve","title":"Replacement UV Lamp \u0026 Sleeve | For Water Doctor EL411, EL720 \u0026 EL1129","description":"\u003ch2\u003eReplacement parts for Water Doctor EL systems\u003c\/h2\u003e\u003cp\u003eThis product includes replacement part options for Water Doctor EL411, EL720 and EL1129 units. Select the correct option based on the model number on your existing system.\u003c\/p\u003e\u003ch3\u003eCompatible models\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEL411\u003c\/li\u003e\n\u003cli\u003eEL720\u003c\/li\u003e\n\u003cli\u003eEL1129\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable options\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEL411 part options\u003c\/li\u003e\n\u003cli\u003eEL720 part options\u003c\/li\u003e\n\u003cli\u003eEL1129 part options\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your model number and selected part type before purchasing.\u003c\/p\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on the system model, usage and water conditions.\u003c\/p\u003e","brand":"Water Doctor Canada Inc.","offers":[{"title":"EL411 \/ Lamp","offer_id":51920583917873,"sku":"GPH450T5L","price":140.0,"currency_code":"CAD","in_stock":true},{"title":"EL411 \/ Sleeve","offer_id":51920583950641,"sku":"UQS-535D","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"EL720 \/ Lamp","offer_id":51920583983409,"sku":"GPH645T5L","price":150.0,"currency_code":"CAD","in_stock":true},{"title":"EL720 \/ Sleeve","offer_id":51920584016177,"sku":"UQS-665D","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"EL1129 \/ Lamp","offer_id":51920584048945,"sku":"GPH845T5L","price":160.0,"currency_code":"CAD","in_stock":true},{"title":"EL1129 \/ Sleeve","offer_id":51920584081713,"sku":"UQS-890D","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/lampeUVexcelightCategorie.jpg?v=1760122255"},{"product_id":"uv-dynamics-replacement-uv-lamp-sleeve","title":"Genuine Replacement UV Lamp \u0026 Sleeve for UV Dynamics Systems","description":"\u003ch2\u003eReplacement parts for UV Dynamics systems\u003c\/h2\u003e\u003cp\u003eThis product includes genuine replacement part options for compatible UV Dynamics units. Select the correct lamp or sleeve based on the model number on your existing system.\u003c\/p\u003e\u003ch3\u003eCompatible model groups\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUVD240, UVD320, UVD320E, UVD320S, UVD6.40, UVD8.30, UVD10.30, UVD10.30E\u003c\/li\u003e\n\u003cli\u003eUVD400, UVD400S, UVD400E, UVD485, UVD10.40, UVD13.30\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable options\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLamp replacement option\u003c\/li\u003e\n\u003cli\u003eSleeve replacement option\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your system model and part type before purchasing, as these parts are model-specific.\u003c\/p\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on the system model, usage and water conditions.\u003c\/p\u003e","brand":"Water Doctor Canada Inc.","offers":[{"title":"UVD240, UVD320, UVD320E, UVD320S, UVD6.40, UVD8.30, 10.30, 10.30E \/ Lamp","offer_id":51920977920305,"sku":"400152","price":140.0,"currency_code":"CAD","in_stock":true},{"title":"UVD240, UVD320, UVD320E, UVD320S, UVD6.40, UVD8.30, 10.30, 10.30E \/ Sleeve","offer_id":51921054138673,"sku":"400151","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"UVD400, UVD400S, UVD400E, UVD485, UVD10.40, UVD13.30 \/ Lamp","offer_id":51920977953073,"sku":"400128","price":160.0,"currency_code":"CAD","in_stock":true},{"title":"UVD400, UVD400S, UVD400E, UVD485, UVD10.40, UVD13.30 \/ Sleeve","offer_id":51921054171441,"sku":"400129","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/large_437_uv_lamp.jpg?v=1760126481"},{"product_id":"water-doctor-gf3-800gpd-replacement-filters","title":"Water Doctor GF3 800GPD Replacement Filters – PPC \/ RO \/ 3C","description":"\u003ch2\u003eReplacement filters for the Water Doctor GF3 800GPD RO system\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003eWater Doctor GF3 800GPD Replacement Filters\u003c\/strong\u003e are made for the GF3 tankless reverse osmosis system. Choose the PPC, RO or 3C cartridge based on the filter stage that needs replacement.\u003c\/p\u003e\u003ch3\u003eCompatible system\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eWater Doctor GF3 800GPD RO System\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eAvailable cartridges\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePPC cartridge\u003c\/strong\u003e for the pre-filtration stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO cartridge\u003c\/strong\u003e for the reverse osmosis stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3C cartridge\u003c\/strong\u003e for the final polishing stage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCustomers maintaining an existing GF3 800GPD system\u003c\/li\u003e\n\u003cli\u003eReplacing one cartridge at a time based on usage\u003c\/li\u003e\n\u003cli\u003eMaintaining flow, taste and everyday system performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintenance note\u003c\/h3\u003e\u003cp\u003eReplacement timing depends on household usage, water conditions and system indicators. Use genuine Water Doctor GF3 cartridges for proper fit.\u003c\/p\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003ePlease confirm your system model is GF3 800GPD before purchasing. These filters are not the same as COMO-R700 or COMO-R1000 cartridges.\u003c\/p\u003e","brand":"Water Doctor Canada Inc.","offers":[{"title":"PPC","offer_id":51965162881329,"sku":"GF3800RPPC","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"RO","offer_id":51965162914097,"sku":"GF3800RRO","price":185.0,"currency_code":"CAD","in_stock":true},{"title":"3C","offer_id":51965162946865,"sku":"GF3800R3C","price":70.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/0850\/5905\/files\/51cg5PJAEIL._SL1500.jpg?v=1761240225"}],"url":"https:\/\/shop.waterdoctor.ca\/collections\/water-filter-cartridges.oembed","provider":"Water Doctor Canada Inc.","version":"1.0","type":"link"}