{"product_id":"chf-compatible-ro-annual-filter-kit","title":"CHF-Compatible RO Annual Filter Kit","description":"\u003cp\u003e\u003cstrong\u003eA full year of filtration in one box. Fitted by you in ten minutes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThree cartridges — everything your alkalising reverse osmosis system needs for twelve months. Delivered free anywhere in Australia. No callout fee, no appointment, no waiting for someone to knock on your door.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStage 1 — 5 micron sediment.\u003c\/strong\u003e Catches sand, silt, rust and scale flakes shed by pipework before they reach anything finer. Unglamorous work, and the reason the rest of the system lasts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStage 2 — coconut carbon block.\u003c\/strong\u003e Reduces chlorine, taste, odour and trihalomethanes. Chlorine degrades the polyamide film an RO membrane is made from, so this cartridge protects your most expensive component as well as improving how the water tastes. Skipping a carbon change is the most expensive saving available in a filtration system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStage 3 — alkalising remineraliser.\u003c\/strong\u003e Reverse osmosis strips out the dissolved minerals that give water its taste, leaving it clean but flat and slightly acidic. This cartridge dissolves them back in — predominantly calcium, with trace magnesium and potassium — lifting the water to a steady neutral-to-weakly-alkaline character, then polishes through coconut carbon. It's deliberately a middle point: not flat RO water, not heavily alkalised water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy the alkalising stage needs RO in front of it.\u003c\/strong\u003e The mineral media only dissolves into mildly acidic water — which is exactly what RO water is. On ordinary mains water, which usually sits above pH 7, it would barely dissolve at all. That's the design: this cartridge belongs after a membrane. One tip — draw water at a modest rate rather than flat out; slower flow means more contact time and better mineral pickup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy replace all three together.\u003c\/strong\u003e The stages work as a chain — a blocked sediment cartridge starves the carbon, spent carbon exposes the membrane, and depleted mineral media leaves the water flat. One job, once a year.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStage 1: 5 micron polyspun polypropylene, 10\" × 2.5\"\u003c\/li\u003e\n\u003cli\u003eStage 2: Coconut shell carbon block, 10\" × 2.5\"\u003c\/li\u003e\n\u003cli\u003eStage 3: Calcium-based mineral media with trace magnesium and potassium, plus coconut carbon — 11\" × 2.5\", 5 micron, ¼\" push-fit\u003c\/li\u003e\n\u003cli\u003eTypical stage 3 output: neutral to weakly alkaline\u003c\/li\u003e\n\u003cli\u003eStage 3 flow rate: up to 3 L\/min\u003c\/li\u003e\n\u003cli\u003eReplacement interval: 12 months, normal household use\u003c\/li\u003e\n\u003cli\u003eFits: RO systems using 10\" × 2.5\" pre-filters with an 11\" × 2.5\" push-fit alkalising stage\u003c\/li\u003e\n\u003cli\u003eDelivery: free, Australia-wide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMembrane not included\u003c\/strong\u003e — replaced every two years, sold separately.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCompatible aftermarket product by ProperWater — not manufactured by or affiliated with Complete Home Filtration.\u003c\/em\u003e\u003c\/p\u003e","brand":"ProperWater","offers":[{"title":"Default Title","offer_id":50953702703356,"sku":"PW-CHF-RO-KIT-3","price":147.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/4895\/3340\/files\/ro-kit.jpg?v=1786268396","url":"https:\/\/properwater.myshopify.com\/products\/chf-compatible-ro-annual-filter-kit","provider":"ProperWater","version":"1.0","type":"link"}